Normal blood cells slide easily through narrow blood vessels. In sickle cell disease many red blood cells change to a crescent shape like a slender moon Crescent-shaped blood cells cause blockages in blood vessels These blockages decrease the transport of oxygen People with sickle cell disease often have sharp pains due to the lack of oxygen in parts of the body Some people have one sickle cell gene and one normal gene They have few defective cells and no symptoms because the sickle cell gene is recessive. How does the method of reproduction in humans result in people getting one copy of a sickle cell gene and one copy normal gene? Describe the process

Answers

Answer 1

Answer:

Explanation:

The method of reproduction in humans is sexual reproduction: a type of reproduction that occurs when new organisms are produced through the coming together of genetic information from two individuals of different sexes mostly a male and a female (egg cell and the sperm). The genetic information for making the blood cells; the red blood cells genes in particular exists on chromosomes in the nucleus of the sex cells (egg and sperm cell) also called the gametes. Basically, the DNA provides instructions for the production of mostly all of the body's needs.

The genes coding for the sickle cells which is the abnormal red cell is always inherited in the recessive form meaning both parent has to possess one copy each of the defective gene in their DNA. For humans to get one copy of a sickle cell gene and one copy normal gene; it means one of the parents gametes (be it male or female) contributed the defective chromosome and the other normal gene is contributed by the other parent  during copulation giving rise to an individual that is heterozygous for the trait

For example, the sperm cell with the defective gene fertilizes the egg cell that has the normal copy of the gene producing an heterozgous individual.


Related Questions

True or False: Too much carbon in seawater prevents clams, snails, and other
sea animals from growing their shells.

Answers

Answer: False................

Answer:

False

Explanation:

Carbon is one of the most abundant resources for sea animals, and they actually need a lot of carbon to grow their shells.

Eric has made a terrarium, a closed container with plants in it, and he has put


enough water into it to satisfy the needs of the plants. Does Eric need to add


water to his terrarium again? Why or why not?

Answers

Answer:

Yes

Explanation:

The water will be used by the plants sooner or later so their basic metabolic needs can be achieved. Also, the plants will loose their water by transpiration, in order to produce their carbohydrates. Therefore the amount of water will not be enough and has to be replenished.


The number of waves that pass through a fixed point per second is the (amplitude, frequency, wavelength)
of the wave. This value increases when the (amplitude, frequency, wavelength)
of the wave decreases

Answers

Answer:

Frequency / Wavelength

Answer:

frequency and wavelenght

Explanation:

The difference between the highest and lowest elevations on a map is the
a.geologic unit
b.topography
c.contour line
d.relief
please

Answers

Answer:

contour line

Explanation:

Answer:

d, relief

Explanation:

The changes in composition in an area over time is called

Answers

Answer:

Ecological Succession.

Explanation:


Replicating the texture of shark skin to inhibit the ability of bacteria to attach to medical surface is an example of what application of biotechnology

A.Biochemical engineering
B. Biomimicry
C. Bioprospecting
D. Environmental biotechnology

Answers

Answer:

Biomimicry

Explanation:

What are two main sources of genetic material found in viruses?

Answers

Answer:

Most have RNA or DNA as their genetic material, but they also consist of a virion, which has nucleic acid and a shell of protein.

Explanation:

Using the F.O. I. L. Method, what are the gam it possible for one parent with the following genotype: BbTt

Answers

Answer: i uh

Explanation: ??:\

What is a drug?
What is the difference between medicines and recreational drugs ?
Give two examples of legal recreational drugs?
Give two example of illegal (against the law) drugs?
What is a depressant?
Give two effects that a depressant drug has on the body.
Give two long term effect of taking a depressant drug.
What is a stimulant?
Give one example of a legal stimulant and one example of an illegal stimulant.
What are the effects of taking a stimulant?

Answers

Answer:

recreational - enjoyment i.e. weed, alcohol (legal)

shrooms, lsd (illegal)

liver or lung failure

stimulant- helps asthma and other things example. dexedrine

the effects of taking stimulants is loss of appetite, increased heart rate, elevated blood pressure and body temperature, interrupted sleep patterns, panic, hallucinations, and irritability.

also a drug is a medicine or other substance which has a physiological effect when ingested or otherwise introduced into the body.

Drug- type of medication used to help pain or to get over something

#2- one is just for fun and one is to actually help you

#3- Alcohol Beverages or Cigarettes/ Tobacco

#4- Molly or Cannabis

#5- sleeping pills

#6- will make you depressed, sad

#7- I don’t know

#8- speed up the brain

#9- legal- nicotine, illegal- cocaine I think

#10- can make you feel more awake, alive

Information related to the organisms found on Earth during
various geological time periods is represented in the accompanying
chart.
OOEEOC 0-0 C-E
2525
-Edw-
4.6 (?) Billion
600 Million
200 Million
60 Million
Years Ago
Years Ago
Years Ago Years Ago
Precambrian
Paleozoic
Mesozoic Cenozoic
(Simple
(Age of Amphibians, Fishes, (Age of Reptiles) (Age of
Multicellular
and Invertebrates)
Mammals)
a organisms and
First Protists)
Past
Present
Geologic Time
Which statement concerning the first appearance of the organisms
over the time period represented in this chart is most likely
correct?

Answers

Answer:

D

Explanation:

Do roots, leaves, or stems do more in photosynthesis in plants?

Answers

Answer:

Leaves

Explanation:

Leaves help are flat and thin which makes it easy for them to take in more light, which makes them play the biggest rold in photosynthesis.

Vestigial structures, such as hip bones in whales and appendixes
in humans, are those that have little or no function for the
organism. What is the most likely reason for this loss of function
over time?
The organism is undergoing speciation.
The organism is experiencing genetic drift.
The structure was over utilized by the organism.
The structure was not highly beneficial to the organism.

Answers

Answer:

A.

Explanation:

Humans used to use the appendix for good bacterial health in the gut. People used to drink dirty water and eat food that had lots of bacteria. The appendix would save them from infection.

Please select the word from the list that best fits the definition
makes up 21 percent of the atmosphere
-conduction
-convection
nitrogen
-oxygen
-Ozone
-radiation
-smog
-water vapor

Answers

Answer:

oxygen

Explanation:

The oxygen makes up 21% of the atmosphere. hope it helps.

Answer:

Oxygen

Explanation:

Oxygen makes up 21% of earths atmosphere while nitrogen fills up 78%.

In fruit flies, the gene for eye color is located on the X chromosome, and the red eye allele (R) is dominant
to the white eye allele (r). A carrier female is mated with a male fly with genotype X
rY. Which of the
following statements best describes the expected outcome of the cross?
a. The chance of an offspring having red eyes is 75%
b. The chance of an offspring having white eyes is 50%
c. The chance that a male offspring will have white eyes is 0%
d. The chance that a female offspring will have red eyes is 100%

Answers

Answer:

b. The chance of an offspring having white eyes is 50%

Explanation:

So the genotype of the male fly is X^r Y. This means the male has white eyes because he only has one X chromosome, so he will express whatever allele is on that chromosome.

The genotype of the female fly, though, is X^R X^r. This is because carriers are heterozygous for traits, and the sex chromosomes of most females is XX (with some exceptions, like XXX, or X (Turner syndrome)).

If we cross this, what are the outcomes? Do a Punnett square. You get the genotypes of X^r X^R, X^r X^r, X^R Y, and X^r Y. The expected phenotypes are a red eye female, white eye female, red eye male, and white eye male.

Now, let's look at the choices:

A.: The chance of an offspring having red eyes is not 75%; it is 50%.

B.: The chance of an offspring having white eyes is 50%!!!

C.: The chance that a male offspring will have white eyes is 50%, not 0%.

D.: The chance that a male offspring will have white eyes is 50%, not 100%.

Sooo, it's B!

Which best describes this excerpt?
Read the excerpt from "A Simple Way to Create Suspense".
For instance, heading toward a movie review program,
remember we asked: Who was the studio's first choice for
the Harry Callahan role in "Dirty Harry"?
We knew most viewers would be intrigued. (What, Clint
Eastwood wasn't the first choice?) But—and this was the
lesson—the success of the tactic didn't depend on intrigue.
Even viewers with no interest at all stuck around to find out.
Humans are hard-wired. They need to know. Even viewers
who knew the answer for sure stuck around, in order to be
gratified. The gap was bridged, and the danger averted. (It
was Frank Sinatra. You waited, right?)
O The central idea of this excerpt is that Clint Eastwood was
not the original choice for the Dirty Harry movie.
O The central idea of this excerpt is that intrigue is the most
important way to create suspense.
O The author uses an analogy to compare his readers to the
characters of a Hollywood movie.
O The author uses a personal anecdote to show that
audiences are willing to wait for an answer.

please answerrr

Answers

Answer:

D: The author uses a personal anecdote to show that audiences are willing to wait for an answer

Explanation:

The main idea of the passage is that he's using a personal anecdote to give an example of how the suspense method works

The different functions of the skeletal system include all of the following EXCEPT: *
a) Forms blood cells
b) Protects internal organs
c) Stores hormones
d) Assists movement

Which type(s) of muscle can contract without stimulation from the nervous system? *
a) skeletal only
b) skeletal and smooth
c) smooth and cardiac
d) cardiac only

Which of the following are events following fertilization? (Check all that apply. There may be more than one answer). *
a) Embryo develops into the fetus
b) Zygote cell rapidly divides
c) Embryo embeds into uterine wall
d) Zygote travels down the fallopian tube toward the uterus

Answers

Number 1 is C
And im not sure about the rest :(

Storing hormones, smooth and cardiac muscles are the correct answers.

Storing hormones is not function of skeleton system. Skeleton system protects internal organs such as heart, kidney and lungs etc. It is also responsible for the movement of the muscles as well as produces blood cells because of the presence of bone marrow.

Smooth and cardiac muscles can contract without nervous system stimulation because they are involuntary Muscle which is beyond the control of the nervous system so we can conclude that storing hormones, smooth and cardiac muscles are the correct answers.

Learn more: https://brainly.com/question/16457313

How is the AB blood group an example of codominant inheritance​

Answers

Answer:

Explanation:

AB blood type is codominant because the red blood cells have the products of both the A and the B alleles of the ABO gene.

Hope that helped!

What is the second most abundant element in the human body?
Select one:
A. carbon
B. methane
C. water
D. oxygen

Answers

water

Explanation:

cuz after blood , water is the next thing that follows

Answer:carbon

Explanation: water is the first abundant element in the human body and carbon is the second

So i forgot what the genetic code is and how its read can somebody please be kind and help me..

Answers

Answer:

i d

Explanation:

DescriptionThe genetic code is the set of rules used by living cells to translate information encoded within genetic material into proteins. adenine(A), cytosine (C),guanine(G), thymine(T) are the “letters” of the DNA code.

How many alleles for one trait are normally found in the genotype for an organism

Answers

Answer:

2

Explanation:

PLEASE HELP I WILL BE GIVING THE BRAINLIEST AND 15 POINTS!!!!!!!!
Charlotte placed raisins in a glass of water and after a while, saw them swell up and get larger. It made her wonder about the way water moved into different items. She knew cells allowed materials in, but she wanted to know more and she read that the cell membrane had specific jobs. Which of the following correctly describes the cell membrane’s function?

A. It is permeable, so it can allow all materials to move freely across the cell membrane.
B. It uses diffusion and osmosis to move all materials into and out of the cell.
C. It uses active transport and facilitated diffusion to move all materials into and out of the cell.
D. It is selectively permeable, so it can allow certain materials to pass through it and prevent others from passing into the cell.

Answers

Answer:

D. It is selectively permeable, so it can allow certain materials to pass through it and prevent others from passing into the cell.

Explanation:

Examine the picture of an onion root tip with cells in various stages of the cell cycle. A student claims that interphase is the longest stage of the cell cycle. Another student claims that mitosis is the longest stage. Using evidence from the photo, determine which student is correct and why. A) Mitosis is the longest stage because anaphase requires more time to separate chromatids. B) Interphase is the longest stage because chromosomes are visible in the majority of the cells. C) Mitosis is the longest stage because the majority of the cells in the photo are replicating their DNA. D) Interphase is the longest stage because the majority of the cells in the photo have uncondensed chromatin and are not dividing.

Answers

Answer:

B

Explanation:

the longest phase in the cell division is interphase because the DNA replication occurs in this phase

As per the image interphase is the longest stage because the majority of the cells in the photo have uncondensed chromatin and are not dividing. The correct option is D.

What is cell cycle?

The cell cycle, also known as the cell-division cycle, is the sequence of events that occurs in a cell that causes it to divide into two daughter cells.

A cell cycle is the series of events that takes place in a cell as it grows as well as divides.

A cell spends the majority of its time in what is known as interphase, where it grows, replicates its chromosomes, and prepares for cell division. The cell then exits interphase, goes through mitosis, and divides completely.

Interphase is the longest stage, according to the image, since the maximum of the cells in the photo have uncondensed chromatin as well as are not dividing.

Thus, the correct option is D.

For more details regarding cell cycle, visit:

https://brainly.com/question/15876101

#SPJ2

Your question seems incomplete, the missing image is attached below:

The flow of energy moves in a circle through a food chain. The energy moves from the grass to the grasshopper. Next, the transfer of energy passes from the snake to the hawk. Finally, the fungi help by breaking down the hawk when it dies, and returns the energy to the grass. Where does the energy that is transferred through this chain originate? A) fungi B) grass C) grasshopper D) sun

Answers

Answer:

i think it is B grass

Explanation:

Grass obtains energy through the use of photosynthesis. Chlorophyll absorbs sunlight and uses its energy to convert carbon dioxide and water into carbohydrates.

Vaccine: What is one advantage of being vaccinated against a particular virus?
I

Answers

Answer:

the vaccinated person's immune system will likely become immune to said virus and it will cause the body vaccinated to develop antibodies

Explanation:

i hope this helps a little bit :))

Antibodies make the cells aware a certain virus is entering the body and detects and fights it off. Which leads you to a fever because that means they're currently working hard to eliminate the virus.

Which chromosome is involved in Prader Willi and Angelman Syndrome?

A) Chromosome # 46

B) Chromosome # 1

C) Chromosome # 15

D) Chromosome #23

Answers

Answer:

C.

Explanation:

Answer:

Chromosome 15

Explanation:

What are the different sensory structures and what are each of them able to
detect?​

Answers

Answer;

Chemoreceptor,Thermoreceptors,Mechanoreceptors,Photoreceptors

Explanation:

Chemoreceptors detect the presence of chemicals

Thermoreceptors detect changes in temperature

Mechanoreceptors detect mechanical forces.

Photoreceptors detect light during vision.


1. Discuss how natural selection affects animal behavior and how behaviors can affect the survival of an animal species

Answers

Answer:

Animal behavior includes all the ways animals interact with other organisms and the physical environment. ... Behavior is shaped by natural selection. Many behaviors directly increase an organism's fitness, that is, they help it survive and reproduce.

Which of the following facts are NOT true about dichotomous keys?

Answers

Answer:

Explanation:

B    C

Who help me about this?

Answers

Answer:

Its easy Ana

Explanation:

The answer to the information above is Ana

Can someone please help me with these two questions I will mark you as the best answer

Answers

For the first question, the third choice seems best.

For the second question, it's light moths.
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Two terms of an arithmetic sequence are a12=70 and a30=124. Write an explicit rule for the nth term.An = ? A losing party in a federal trail court can The French and Indian War began because some American colonists felt that: a. taxes were too high, so they solicited help from both the French and the Indians. b. they had to aid the English, who were fighting Napoleon in Europe. c. the Indians along the frontier finally had to be subdued. d. French Jesuits were converting too many Indians to Catholicism, endangering the Protestant majority on the North American continent. e. France was encroaching on land claimed by the Ohio Company. Which Sentence is FALSE?Picasso experimented with shapes during his CubistPeriod.Picasso communicated his feelings and ideas throughcolors.Picasso explored death and sadness during his BluePeriod.Picasso only painted performers during his Rose Period. How did mendeleev arrange the elements ? What were the wrongs in these issues when Gandhi was still around?EducationEthical IssuesReligious or Culturel DifferencesGender InequalityProtection of minoritiesTHANKS! During the process of mountain building, earthquakes sometimes occur along continental-continental convergent boundaries. Which statement best describes the motion of the plates along these boundaries that causes the earthquakes?The plates push apart from each other with no subduction.Subduction occurs with the less-dense plate sinking below the other plate.Subduction occurs with the more-dense plate sinking below the other plate.The plates smash together with no subduction. Under which president did the us accumulate the most debt If you disagree with a point a discussion partner is making, it is usually a good idea to:A. change the subject.B. enlist others to join your effects C. repeat your argument D. ask verifying questions ________ tiene una luz verde, una luz amarilla, y una luz roja. helppp please hurry! Find the parallelogram. the stained glass below shows bilateral symmetry. The two overlapping squares are congruent. What is the area of the window? Teri has a bag of colored marbles. Five marbles are red, four are green, ten are blue, and one is white. Marbles are randomly selected out of the bag.What is the probability of selecting a red marble and then a white marble without replacement? Africas landscape is essentially __________. Correct answers only please!To the nearest cent, how much interest will she earn in 2 years?Use the formula B = p(1 + r)t, where B is the balance (final amount), p is the principal (starting amount), r is the interest rate expressed as a decimal, and t is the time in years. Which of these is a reason why two different people might require different caloric intakes on a daily basis? Explain the economy of each region of the United States A weather forecast shows 35 m/h on the weather map. Which weather component does this number represent?A.HumidityB. Precipitation C.Wind direction D.Wind speed You work at a sports store. A customer enters and tells you she wants to make sure she consistently performs activities within her training zone limits. Choose the best product for this customer's needs. #1 Blood pressure monitor #2 Heart rate monitor #3 Running shoes #4 TreadmillWILL GIVE BRAINLIEST!!!!!!