Since ADHD is a complex disorder, a significant variety of genes and environmental factors are believed to have a role in its development.
One of the most prevalent neurodevelopmental diseases in children is ADHD. It frequently persists into maturity and is typically first diagnosed in infancy. Children with ADHD may struggle to focus, manage impulsive behaviors (doing without considering the consequences), or be extremely active.What are the symptoms of ADHD?
Frequently struggles to focus on tasks or play activities. Frequently appears unable to hear when directly addressed. Frequently ignores directions and does not complete tasks, chores, or work-related responsibilities (e.g., loses focus, side-tracked). Has a lot of problems planning activities and tasks.
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What are your thoughts on extraterrestrial life in our galaxy/universe?
Do you think there is life elsewhere? Where might we find it?
What might that life look like, or how might it be different from what we know?
Would it be primitive or developed/intelligent?
Would that other life form try to explore the galaxy/universe or find other life forms like us?
Answer:
Yes I do indeed believe in aliens of extraterrestrial life
the results of the experiemnts can be used as evidence in support of which of the following scientific colaiims about mitochrondial activity
ATP manufacturing in mitochondria requires a hydrogen ion gradient that favors movement of protons into the mitochondrial matrix
For every ATP produced, protons go with the flow through the F0 unit of the ATP synthase and down the electrochemical gradient from the intermembrane area to the mitochondrial matrix.
at the internal mitochondrial membrane, a excessive electricity electron is passed alongside an electron delivery chain. The strength launched pumps hydrogen out of the matrix space. The gradient created by using this drives hydrogen back thru the membrane, via ATP synthase.
The proton gradient produced by using proton pumping for the duration of the electron transport chain is used to synthesize ATP. Protons glide down their awareness gradient into the matrix through the membrane protein ATP synthase, inflicting it to spin (like a water wheel) and catalyze conversion of ADP to ATP.
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An ecosystem is an open system in terms of energy, and an open system in terms of matter
Answer:
An open system allows for the flow of both matter and energy with its surroundings. An open system may be found in any environment. Sunlight, for instance, may provide energy to the system and heat can be released. There are several ways for the matter to enter the system.
Explanation:
homo heidelbergesis . group of answer choices invented the bow and arrow all of these statements are correct made cave paintings controlled fire
Homo Heidelbergesis controlled fire (D). Because they are the first species who made compound tools.
What is the meaning of Heidelbergensis?Homo heidelbergensis is a type of primitive man who lived in Europe. Sometimes known as Heidelberg man. Type of Homo Heidelberg is primitive, they are refer to person who in early stage of civilization.Homo Heidelbergensis was the ancestor of both anatomically modern humans and Neandertals, they are was the first species to build free-standing structure. They were most likely descended from the Denisovans of Russia. Ethiopia has the oldest Homo heidelbergensis fossils. Homo heidelbergensis' brain was nearly as large as ours.Heidelbergensis was capable of controlling fire by building hearths, or early fireplaces, by 790,000 years ago in the form of fire-altered artifacts and charred wood at the site of Gesher Benot Ya-aqov in Israel.Learn more about Heidelbergensis here: brainly.com/question/9058087
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during the light reactions, chemical reactions are occurring simultaneously at photosystem i and photosystem ii. on the left, put the reactions starting at photosystem ii in order from first to last. then, on the right, put the reactions starting at photosystem i in order from first to last.
The reactions in Photosystem I and Photosystem II from first to last in order, are :
Photosystem I :
Light energy excites and ejects electrons from Photosystem IElectrons reduce NADP+ to NADPHPhotosystem II :
Light energy excites and ejects electrons from Photosystem IIHydrogen ions move into the thylakoid space.Hydrogen ions move back to the stroma, producing ATP.What are Photosystem I and II ?An antenna complex and a response center make up a photosystem. Based on the varying chlorophyll absorption wavelengths, there are typically two types of photosystems. Photosystem I and Photosystem II are the two photosystems.
These two photosystems, PS I and PS II, are membrane protein complexes with many subunits that take part in oxygenic photosynthesis. Chlorophyll is the pigment that is primarily responsible for absorbing light energy.
Light energy stimulate and eject electrons from Photosystem I, and electrons then convert NADP+ to NADPH in Photosystem I.
In Photosystem II, light energy activates Photosystem II, ejects electrons, hydrogen ions enter the thylakoid space, and hydrogen ions exit the stroma, resulting in the production of ATP.
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Besides increasing blood pressure and causing drinking, angiotensin II stimulates the release of ______, which is crucial to Na+ conservation
Besides increasing blood pressure and causing drinking, angiotensin II stimulates the release of aldosterone.
A steroid hormone made by means of the adrenal cortex. It allows for managing the balance of water and salts within the kidney by using preserving sodium and liberating potassium from the frame. Too much aldosterone can purpose excessive blood strain and a build-up of fluid in body tissues.
In hyperaldosteronism, overproduction of the hormone aldosterone leads to fluid retention and improved blood pressure, weak point, and, rarely, periods of paralysis. Hyperaldosteronism can be a result of a tumor in the adrenal gland or can be a response to some illnesses.
Aldosterone reasons sodium to be absorbed and potassium to be excreted into the lumen through principal cells.
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which of the following best explains the connection between energuy, growth, and the maintenance of an ordered system in teh experiment
The connection between energy, growth, and the maintenance of an ordered can be described as grass requiring light energy to grow and maintain its ordered structure.
Energy is passed from the producers. Animals use the energy they get from their food to keep their bodies warm and carry out other metabolic tasks. During the process of cellular respiration, glucose, which is found in the food that animals eat, is broken down into an energy source called ATP. Order is maintained by coupling cellular processes that increase entropy (which results in changes to free energy that are negative) with those that decrease entropy (which results in changes to free energy that are positive). To maintain order and power cellular processes, energy input must be greater than free energy lost to entropy.
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match each description to the appropriate stem cell type. embryonic stem cell induced pluripotentstem cell (ipsc) bothcan be used to repair or replacecan develop into any type of tissue damaged tissue
Embryonic stem cells-Can evolve into any type of tissue and can be used to repair or replace damaged tissue
Induced pluripotent stem cells (iPSC)-Can evolve into any type of tissue and can be used to repair or replace damaged tissue
Embryonic stem cells are cells that exist in the early stages of animal and human development. Their ability to differentiate into any cell type in the body makes them a promising tool for regenerative medicine and tissue repair.
Induced pluripotent stem cells (iPSCs) are a type of stem cell generated by reprogramming mature cells from an individual's body. Skin cells are generated in an embryonic stem cell-like state. Like embryonic stem cells, iPSCs have the ability to differentiate into any type of cell in the body and can be used to repair or replace damaged tissue.
Both embryonic stem cells and iPSCs have potential uses in a variety of medical applications, including repairing or replacing damaged tissue, developing new drugs and treatments, and studying diseases and conditions at the cellular level. However, the use of these cells in research and therapy is still an area of active investigation and further research is needed to fully understand their potential and limitations.
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Which of the following does cardiac muscle and skeletal muscle have in common? Select all that apply. A actin
B myosin
C Z discs
D intercalated discs
E A band
The following which cardiac muscle and skeletal muscle have in common include:
A actin
B myosin
C Z discs
E A band
What is a Muscle?This is referred to as a soft body tissue consisting of long cells that can contract and produce motion or movement and is an important part of the musculoskeletal system in the body.
They are involved in the movement of various parts of the body and they work hand in hand with the bones to ensure that there is adequate functioning between the cells and various tissues.
Skeletal and cardiac muscles have protein such as actin and myosin and there is also the presence of a Z disc and A band. Intercalated discs on the other hand is only present in the cardiac muscles which us therefore why they were chosen as the correct choice.
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According to the geological time scale, (blank) evolved after the first insects evolved.
The geological time frame states that reptile species evolved just after primordial invertebrates.
Which species do you mean?A group of creatures that can breed each other in nature and create healthy offspring is referred to as a biological species. Homo sapiens (humans), Fabricius catus (domestic cats), and Vulpes vulpes are a few instances of species names (red fox).
Why do species exist?The organisms concept, which describes a form as representatives of populations that may interbreed with one another to generate viable children, is dependent on interbreeding. The offspring must be capable of reproducing on their own in order to be deemed "viable." The majority of people define biodiversity as a collection of unique living things with the ability to interbreed. Samples of species include white-tailed deer, blue whales, and white pine.
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Which of the following are abiotic factors that determine the organisms that can exist in marine environments?
O amount of oxygen and salt concentration
O amount of carbon dioxide and amount of decomposers
O amount of moisture and variety of consumers
O amount of algae and range of temperature
Answer:
O amount of moisture and variety of consumersAbiotic factors include sunlight, temperature, moisture, wind or water currents, soil type, and nutrient availability.a.suppose that you want to engineer the viral genome such that genes required for its dna replication are regulated by cellular rather than viral proteins
Engineering the viral genome such that genes required for its DNA replication are regulated by cellular rather than viral proteins is an important scientific endeavor. This type of engineering is known as “re-engineering the viral genome,”.
The first step in re-engineering the viral genome is to identify the genes that are necessary for the replication of the virus. These genes are typically found in the viral DNA, and they encode the instructions for viral replication. Once these genes have been identified, the next step is to determine which cellular proteins can be used to regulate the expression of these genes. This is done by analyzing the cellular protein-DNA interactions that occur during the replication process.
Once the cellular proteins that can be used to regulate the expression of the viral genes have been identified, the next step is to engineer the viral genome to ensure that these proteins are expressed in the right amounts and at the right times. This involves introducing DNA sequences into the viral genome that will control the expression of the desired proteins. For example, a promoter sequence can be inserted into the viral genome to ensure that the cellular proteins are expressed when they are most needed. Similarly, transcription factors can be introduced to control the expression of the proteins at specific times and in specific concentrations.
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What strategy would you use to achieve this goal?
A population of rabbits is not experiencing any population growth, so the population size is stabilizing. Given that the immigration and emigration are the same, which of the following statements is true?
1.The birth rate equals the death rate
2.The birth rate is greater than the death rate
3.The birth rate is less than the death rate
4.The birth rate is exponentially greater than the death rate
ASAP
Answer: The first choice is the answer
Explanation: The population is stabilized, if it were the other ones, then there would be more or fewer bunnies. if that makes any sense.
Which statement regarding VSM function and cytoskeletal dynamics is best supported by the data in Table 1?A. Vasoconstriction is associated with an increase in the ratio of F-actin to G-actin.B. F-actin levels decrease as phosphorylation of LC20 increases.C. Vasodilation does not affect phosphorylation levels of calponin.D. Arterial diameter reduction is always dependent upon increased calponin phosphorylation
Which statement regarding VSM function and cytoskeletal dynamics is best supported by the data in Table
A. Vasoconstriction is associated with an increase in the ratio of F-actin to G-actin.
Describe the cytoskeletal system.All eukaryotic cells and a large number of prokaryotic cells have cytoskeletal systems, which are networks of polymer. They serve as a means of information transmission and integration between cellular dimensions and aid in the transformation of a disorganized horde of macromolecules into a spatially structured, living cell.microtubules, intermediate filaments, etc. Myosin is frequently linked with microfilaments.
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Which of the following occurs during meiosis? Select all that apply.
Produces two diploid cells.
Produces four haploid cells.
Produces gametes
Produces body cells
Resulting cells are unique
Resulting cells are identical
Homologous chromosomes pair up
Crossing over occurs
Answer:
A, b,d
in meiosis those occur
There are two types of systems: open and closed. An open system is one in which energy can be transferred between the system and its surroundings. The stovetop system is open because heat can be lost into the air. A closed system is one that cannot transfer energy to its surroundings. Biological organisms are open systems.
Biological organisms are open systems. Through the consumption of energy-storing molecules and the release of energy to the environment through labor, they exchange energy with their surroundings.
Energy is governed by the rules of physics, just like everything else in the physical universe. The movement of energy inside and between all systems in the universe is governed by the principles of thermodynamics. Cells are biological systems on their own. One way to think about systems is as having some degree of order open systems. A system needs energy to be brought into order. The lower the entropy, the more organized a Biological organisms.
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The first individual of the new species would be very unlikely to find a mate.
According to the biological species concept, organisms belong to the same species if they can interbreed to produce viable, fertile offspring.
Major points. The biological species idea states that organisms may only interbreed and generate viable, fruitful offspring within their own species. Prezygotic and postzygotic barriers exist between species, preventing mating or the generation of viable, fruitful offspring. Hybridization is the mixing or breeding of organisms from two distinct species. Hybrids are the progeny that result from these mixtures. In the natural world, hybrids constitute a significant factor in evolution. When formerly interbreeding species can no longer mate and generate fruitful offspring, this is known as reproductive isolation. When individuals of comparable groups can no longer interbreed to generate fruitful children in their natural habitat, speciation takes place.
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Use the dropdown menus below to show the correct order in which you'll do things during the Antiseptics and Disinfectants exercise. Not all answer choices will be used. 2. [Choose) [Choose) Place paper disc onto nutrient agar plate Dip paper disc onto an antiseptic or disinfectant Swab surface of nutrient agar plate with bacteria Incubate nutrient agar plate Place antiseptic or disinfectant onto the agar.
The correct order of answer is:
a) Incubate nutrient agar plate
b) Place antiseptic or disinfectant onto the agar
c) Place paper disc onto nutrient agar plate
d) Dip paper disc onto an antiseptic or disinfectant Swab surface of nutrient agar plate with bacteria
An antibiotic is a particular type of antiseptic agent that combats microorganisms. Because they are the most efficient sort of antibacterial agent for doing so, antibiotic medications are frequently used in the treatment and prevention of bacterial illnesses. Bacteria can be eliminated or their growth can be stopped. Only a small number of antibiotics also possess antiprotozoal qualities. Antiviral medications, also referred to as antivirals, are prescribed pharmaceuticals that work to stop the spread of viruses rather than treating specific viruses like the flu or the common cold with antibiotic properties. Antifungal medications, which stop the spread of fungus, are also ineffective against fungi.
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DNA is like a twisted ladder. The sides of the ladder are a______ ______backbone. The rungs of the ladder are _____ _____
DNA is like a twisted ladder. The sides of the ladder are a alternating sugar (deoxyribose) and phosphate groups is backbone. The rungs of the ladder are 4 nitrogen bases, thymine (T), adenine (A), cytosine (C), and guanine (G).
What is the ladder of DNA?In agarose or acrylamide gel electrophoresis, a solution containing DNA molecules of various lengths is known as a DNA ladder. It is used as a guide to determine the size of unidentified DNA molecules that were separated based on their mobility across a gel under an electrical field.By comparing the experimental samples' DNA bands to the closest ladder fragment, researchers may estimate the size of the bands in their DNA using the ladder. You can quickly and precisely determine your DNA band sizes by using the appropriate ladder.We can estimate the size of our experimental DNA pieces using the DNA ladder after electrophoresis. We compare a DNA ladder, which is a collection of DNA fragments with established molecular weights, to our experimental samples.Learn more about DNA ladder refer to :
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Unit 4 FRQ: Question #1
Read each question carefully. Write your response in the space provided for each part of each question. Answers must be written out in paragraph form. Outlines, bulleted lists, or diagrams alone are not acceptable and will not be scored.
Growth hormone and insulin are protein hormones that regulate carbohydrate metabolism by hepatocytes (liver cells) through the activation of intracellular signaling pathways. Researchers investigated whether the two hormones trigger the same or different intracellular signaling pathways in hepatocytes. The researchers added either growth hormone or insulin to parallel cultures of hepatocytes. At several time points after the hormone addition, they purified total intracellular protein from the cells and quantified the level of the phosphorylated forms of two proteins involved in two different signaling pathways (Figure 1, A and B).(a) Describe the first interaction that triggers signaling to begin in a target cell.
(b) Identify a dependent variable in the experimental design. Identify a negative control for the effects of hormone addition. Identify a likely reason why the researchers continued their experiment for 240 minutes.
(c) Describe the hormone and signaling protein combination that produced the greatest and most prolonged response. For the phosphorylated STAT5 response that reached 100 percent at 10 minutes in Figure 1A , calculate the rate of decrease (percent decrease per minute) in the detected level of phosphorylated STAT5 from 10 to 30 minutes.
(d) The researchers claim that the similar regulation of carbohydrate metabolism by hepatocytes when the cells are treated with growth hormone or insulin results from the activation of different signaling pathways. Use the data from the researchers’ experiment to support their claim.
a) The STAT receptor dimerizes, resulting in the adhesion of these attributes to response elements in the nucleus.
b) The introduction of the Growth hormone receptor or insulin to the hepatocyte culture is the dependent variable in the experiment. The negative control for the additament of insulin in the hepatocyte cell will be the assessment of the accumulation of the STAT5 protein inside the cell. The experiment lasted 240 minutes in order to investigate and perceive the signaling cascade activation mechanism within the cell.
c) The rate of decrease in phosphorylated STAT5 protein levels from 10 to 30 minutes is equal to 3 minutes.
d) The increase in insulin levels causes the transformation of glucose molecules to glycogen, which is stored within the liver. This is insulin's effect on carbohydrate metabolism. The addition of growth hormone leads to an increase in fat degradation and the generation of triglycerides and fatty acids, while inhibiting the intake and utilization of glucose molecules within human body cells.
The linkage of the growth hormone to the growth factor receptor activates the protein phosphorylation cascade. The JAK2 protein is phosphorylated, which induces activation, and the STAT5 protein is phosphorylated, which is required for adhesion to the glucocorticoid response elements in the promoter region of the gene. The STAT receptor dimerizes, resulting in the adhesion of these factors to response components in the nucleus.
When insulin is introduced to the hepatocyte culture, it binds to the insulin receptors on the cells, activating the various cell signaling mechanisms. This results in tyrosine receptor phosphorylation and activation of the IRS protein phosphorylation signaling mechanism.
The inclusion of the Growth hormone receptor or insulin to the hepatocyte culture is the dependent variable in the experiment. The stimulation of the cell signaling cascade, as well as the degree of contamination of these proteins inside the cell prior to degradation, determine the experiment's half life. The analysis of the levels of the phosphorylated kinase protein B in the growth hormone added hepatocyte cell will be the negative control, and the analysis of the concentration of the STAT5 protein inside the cell will be the negative control for the addition of insulin in the hepatocyte cell. The experiment lasted 240 minutes in order to analyze and perceive the signaling cascade activation mechanism within the cell.
The increase in insulin levels induces the transformation of glucose molecules to glycogen, which is stored in the liver. This is insulin's effect on carbohydrate metabolism. The addition of growth hormone leads to an increase in fat degradation and the production of triglycerides and fatty acids, while inhibiting the intake and utilization of glucose molecules within human body cells. Growth hormone also tends to increase glycogen breakdown to release glucose molecules within the human body. Both insulin and growth hormone action causes the secretion and production of the insulin-like growth factor IGF-I, which leads to an increase in the amino-acid biosynthesis pathway.
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A ______ is an inherited feature that varies from individual to individual.A ______ is one particular variation of a character.A genetic cross involving parents that differ in a single character is called a _____________.Most human genes come in alternate versions called ________.If an organism has two non-identical versions of a gene, the one that is expressed in the organism is called the ________ allele.If an organism has two non-identical versions of a gene, the one that is not expressed in the organism is called the ________ allele.The physical traits of an organism are called its _______.The _______ is the genetic makeup of an organism.In a test cross, F2 refers to ______.Black eyes are dominant to orange eyes, and green skin is dominant to white skin. Sam, a MendAlien with black eyes and green skin, has a parent with orange eyes and white skin. Carole is a MendAlien with orange eyes and white skin. If Sam and Carole were to mate, the predicted phenotypic ratio of their offspring would be _____.A phenotypic ratio of 9:3:3:1 in the offspring of a cross indicates that _____.In a situation in which genes assort independently, what is the ratio of the gametes produced by an AaBB individual?You cross two fruit trees. One tree produces lemons with spiky leaves. The other produces limes with smooth leaves. Your F1 generation produces lemons with smooth leaves and spiky leaves. What are the genotypes of the parents? L = lemons; l = limes; S = smooth leaf; s = spiky leaf.Imagine that long fins in zebrafish is a dominant trait. A breeder wants to set up a breeding program beginning with homozygous dominant long-finned fish. If she obtains a handful of the long-finned fish, how can she tell which if any of these are homozygous for the trait?Genetics studies the inheritance of ______.Genes are located on _____.The transmission of traits from one generation to the next is ______.When self-fertilization produces offspring all identical to the parent, it is called _______.The offspring of two different varieties are _______.What kind of genotype has identical alleles?What kind of genotype has two different alleles?What is a Punnett square?A ______ is the specific location of a gene along a chromosome.In Mendel's monohybrid cross of true-breeding purple-flowered and white-flowered peas, all members of the F1 generation were of the _____ phenotype because their genotype was _____ for the flower-color gene.
1. A character is an inherited feature that varies from individual to individual.
2. A trait is one particular variation of a character.
3. A genetic cross involving parents that differ in a single character is called a monohybrid cross.
4. Most human genes come in alternate versions called alleles.
5. If an organism has two non-identical versions of a gene, the one that is expressed in the organism is called the dominant allele.
6. If an organism has two non-identical versions of a gene, the one that is not expressed in the organism is called the recessive allele.
7. The physical traits of an organism are called its phenotype.
8. The genotype is the genetic makeup of an organism.
Black eyes are dominant to orange eyes, and green skin is dominant to white skin. Sam, a MendAlien with black eyes and green skin, has a parent with orange eyes and white skin. Carole is a MendAlien with orange eyes and white skin. If Sam and Carole were to mate, the predicted phenotypic ratio of their offspring would be 1 black eye, green skin: 1 black eye, white skin: 1 orange eye, green skin: 1 orange eye, white skin Sam's genotype is BbGg, and Carole's genotype is big.
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In an antibody molecule, one light chain is bonded to one heavy chain, and the two heavy chains are bonded to one another with _____ bonds, creating a symmetrical Y-shaped arrangement
Disulfide
One light chain is linked to one heavy chain in an antibody molecule, and the two heavy chains are joined together by disulfide bonds to form a symmetrical Y-shaped configuration.
The immune system uses antibodies, also known as immunoglobulins or large Y-shaped proteins, to identify and eliminate foreign entities like dangerous germs and viruses. The pathogen molecule that the antibody specifically recognises as an antigen. When the immune system of the body detects harmful substances, or antigens, it produces an antibody, a type of protein. Antigens include substances and microbes (bacteria, fungi, parasites, and viruses), among others. In response to infection, the immune system creates proteins called antibodies.
In an antibody molecule, one light chain is bonded to one heavy chain, and the two heavy chains are bonded to one another with _____ bonds, creating a symmetrical Y-shaped arrangement?
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question at position 16 when populations get very small, harmful alleles may be expressed in individuals more often because:
When populations get very small, harmful alleles may be expressed in individuals more often because:
The gene pool becomes smaller and more limited: In a small population, there are fewer genetic variations present, which means that harmful alleles that may be present in the gene pool are more likely to be expressed in individuals.There is an increased risk of inbreeding: In a small population, there is a higher likelihood of inbreeding, which means that individuals are more likely to mate with close relatives. The effects of natural selection are weakened: In a larger population, natural selection can help to eliminate harmful alleles by favoring individuals with beneficial traits.This is why it is important for populations to maintain a certain level of genetic diversity, which can help to buffer against the negative effects of harmful alleles and preserve the overall health of the population.
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Require immediate assistance, will provide Brainliest to first valid and complete answer
Assuming complete dominance for both genes, 1) Parent 1: SsYy. 2) Parent 2: SsYy. 3) FOIL = First / Outside / Inside / Las ⇒ F: SY. O: Sy. I: sY. L: sy. 4) Parent 1 gametes: SY, Sy, sY, sy. 5) Parent 2 gametes: SY, Sy, sY, sy. 6) Offspring phenotype ratio ⇒ 9:3:3:1
What is complete dominance?
Complete dominance refers to the inheritance pattern in which a dominant allele completely hides the expression of a recessive allele.
This pattern can only be seen in heterozygous individuals in which both alleles are together in the same genotype. The only phenotype expressed is the dominant one.
In the exposed example,
Shape
S is the dominant allele and codes for sphericals i the recessive allele and codes for dentedColor
Y is the dominant allele and codes for yellowy is the recessive allele and codes for greenCross: Two heterozygous individuals
Parentals) SsYy x SsYy
Gametes) SY, Sy, sY, sy SY, Sy, sY, sy
Punnett square) SY Sy sY sy
SY SSYY SSYy SsYY SsYy
Sy SSYy SSyy SsYy Ssyy
sY SsYY SsYy ssYY ssYy
sy SsYy Ssyy ssYy ssyy
F1)
Genotype: We expect to find the following proportions among the progeny
1/16 SSYY2/16 SSYy1/16 SSyy2/16 SsYY4/16 SsYy2/16 Ssyy1/16 ssYY2/16 ssYy1/16 ssyyPhenotype: We expect to find the following proportions among the progeny
9/16 plants with spherical and yellow seeds S-Y-3/16 plants with spherical and green seeds S-yy3/16 plants with dented and yellow seeds ssY-1/16 plants with dented and green seeds ssyyParent 1 genotype: SsYy
Parent 2 genotype: SsYy
Foil to determine gametes⇒ FOIL = First / Outside / Inside / Last
F ⇒ SYO ⇒ SyI ⇒ sYL ⇒ syParent 1 gametes: SY, Sy, sY, sy
Parent 2 gametes: SY, Sy, sY, sy
Offspring phenotype ratio⇒ 9:3:3:1
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which of the following mechanisms prevent gene flow after fertilization has taken place? select all that apply.
which of the following mechanisms prevent gene flow after fertilization has taken place Genetic drift
Genetic drift is the arbitrary change in the population's frequency of a gene variant that already exists. Gene variations may totally vanish due to genetic drift, which would limit genetic diversity. Additionally, it can make previously uncommon alleles far more common and even fixed.Genetic drift is the chance or random event that causes the frequency of one allele to change over time in relation to the other alleles in a population. The so-called bottleneck effect is one instance in which the impact of genetic drift is amplified. Allelic drift and the Sewall Wright effect are synonyms.
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2
A student takes two herbicide-resistant weeds and determines that the allele for herbicide resistance is dominant (H). The genotype of each plant is HH and Hh
respectively. In a cross between these two weeds, what percentage of the offspring would be resistant to herbicide?
A) 50%
B) 100%
0%
25%
Answer:
(B)
Explanation:
name the cellular organelles and explain the function of each. be sure to include the the function of each type of er.
An organelle is a subcellular structure that has one or more specific jobs to perform in the cell, just like an organ does in the body.
Single Membrane Bound Organelles vacuole,lysosome,golgi apparatus, endoplasmi reticulum are single membrane bound organelles present only in a eukaryotic cell. Double Membrane Organelle: Nucleus, mitochondria,and chloroplasts are double membrane organelles present only in a eukaryotic cell.The thirteen parts of an animal cell are vacuoles, cytoplasm,vesicles centrioles,ribosomes nuclear membrane,cell membrane,cytoskeleton,mitochondria,endoplasmic reticulum,nucleolus, golgi apparatus and nucleus.Nutrition transport,respiration excretion regulation,growth reproduction,synthesis and metabolism are vital functions or characteristics shared by living beings.In complex organisms like humans,tissues grow by simple multiplication of cells.
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The high concentrations of persistent organic pollutants (POPs) in wildlife and humans living in the Arctic are not associated with which one of the following? Select one a. POPs are not easily broken down into harmless compounds b. POPs tend to bioaccumulate c. POPs have a high potential for long-range transport d. POPs are very soluble in water
The high concentrations of persistent organic pollutants (POPs) in wildlife and humans living in the Arctic are not associated with d. POPs are very soluble in water.
According to UNEP/GPA 2006a, a group of toxic chemicals known as POPs can persist in the environment for several years before breaking down. POPs are found all over the world, and the repeated evaporation and deposition of chemicals released in one region can deposit them far away from where they came from.
Mines, military installations, smelters, power plants, and a variety of other sources can produce and release POPs. However, the Arctic is only the source of a small number of pollutants. They are transported from farther south over long distances by air, water, and, to a lesser extent, migratory species. In contrast to warmer environments, the unique environmental conditions of the Arctic tend to "trap" pollutants because the cold encourages their persistence. Bioaccumulation is a method by which POPs are also stored and concentrated in the fatty tissues of animals. POPs are by and large profoundly lipophilic in this way not soluble in water. As a result, it is thought that POPs transfer to water at a relatively slow rate.
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The DNA polymerases are positioned over the following DNA segment (which is part of a
much larger molecule) and moving from right to left. If we assume that an Okazaki fragment is
made from this segment, what will be the fragment's sequence? Label it's 5' and 3' ends.
5' - ...CCTTAAGACTAACTACTTACTGGGATC... - 3'
3' - ...GGAATTCTGATTGATGAATGACCCTAG... - 5'
The bottom strand will serve as a template for the okazaki fragment, so the fragment's sequence will be:
5' - ...CCTTAAGACTAACTACTTACTGGGATC... - 3'
The Okazaki fragment will use the bottom strand as a template, hence its sequence will be: 5' -...CCTTAAGACTAACTACTTACTGGGATC... - 3'
The largest subunit has polymerization activity. DNA polymerases position themselves on the next segment of DNA which is part of a much larger molecule and move from right to left. The active site of the enzyme has two parts. At the insertion site, nucleotides are added. After adding, the newly formed base pair migrates to the post-insertion site. There are five DNA polymerases identified in E.coli. All DNA polymerases differ in structure, functions, rate of polymerization, and processivity. DNA polymerase I remove the RNA primer by 5'→3' exonuclease activity and replace the primer by its lagging strand polymerase activity. Explore more. The replication process is a huge task and is important in maintaining the integrity of the genome.
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choose the one alternative that best completes the statement or answers the question. which of the following is the opening at the base of the skull?
The foramen magnum allows access to the cranial cavity where the brain is located posteriorly.
The largest foramen of the skull is called the foramen magnum, which is Latin for "great hole." The most noticeable characteristic in the floor of this aspect of the cranial base is a huge central opening with an oval shape that is located in the deepest part of the posterior cranial fossa. It is contained within the anteromedian aspect of the occipital bone, specifically. The superior articular facets on the lateral masses of the atlas (vertebra C1) engage with the occipital condyles on the anterolateral edges of the foramen magnum, allowing nodding movements. The external occipital crest, a conspicuous ridge, also extends from the midline posterior boundary of the foramen magnum to the external occipital protuberance of the occipital bone.
Hence, opening provided to interconnected spinal cord and brain.
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