The incidence of spinal muscular atrophy (an autosomal recessive disease) in the United States is about 1 case in every 17,000. Whereas, in North Dakota, the prevalence is 1 in 6720. Which of the following would support the hypothesis that genetic drift was responsible for the increased allele frequency in North Dakota?
A. There is an abnormally high concentration of mutagenic chemicals in the ground water causing an increased mutation rate in North Dakota.
B. One of the best treatment centers for SMA is located in North Dakota causing migration of SMA carriers into the area at an abnormally high frequency
C. The original settlers of North Dakota were a small group of pioneers who happened to have an abnormally high frequency of the SMA allele in their population.
D. A particular mosquito-born parasite native to North Dakota causes high infant mortality; carriers of the SMA allele are less likely to catch the disease.

Answers

Answer 1

Answer:

check this out

Explanation:

A paragraph is a series of related sentences developing a central idea, called the topic. Try to think about paragraphs in terms of thematic unity: a paragraph is a sentence or a group of sentences that supports one central, unified idea.

Answer 2

Genetic drift says it is a random selection of a genetic variant that causing a change in allele frequency in a population.

One of the best treatment centers for Spinal Muscular Atrophy  is located in North Dakota causing migration of SMA carriers into the area at an abnormally high frequency. Thus option B is correct.

What is spinal muscular atrophy?

It is a group of  autosomal recessive inherited disorders cause progressive muscle degeneration and weakness. One of the second leading neuromuscular disease.

Three types of SMA affect only children of less than 1 year and , type IV and Finkel type observed in adult, Symptoms in adult include weakness in muscles, tremor etc.

Type 1  SMA seen during birth symptoms include difficulty breathing and swallowing, Type II  show muscle weakness between ages 6 and 12 months, Type III is juvenile type unable to  stand and walk.

Type IV causes muscle weakness, tremor and twitching.

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Related Questions

A proper balance of oxygen and carbon dioxide must be maintained in the human body to survive. Which of the following body systems is responsible for taking in and releasing these gases to ensure homeostasis?

Answers

Pls look on my page and help while I do ur question

The executive office or agency that is responsible for coordinating energy problems is called the

Answers

Answer:

Pretty sure it is Department of Energy

Explanation:

Which things need to be present for natural selection to take place? (select all that apply)
A.Variation in the population.
B.The ability for asexual reproduction.
C. Competition between organisms.
D. Large amounts of resources.

Answers

Answer:

A & C

Explanation:

Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population. If they are met, natural selection automatically results.

YES - A) You must have variation in the population, typically in the terms of "fitness" or having admirable/sucessful traits that make them more likely to reproduce and ensure their own offspring are fit too.

NO - B) It is sexual (not asexual) reproduction that uses natural selection for their offspring. Although some asexual organisms use natural selection, it is ALWAYS used if possible with natural selection to ensure the fitness of characteristics is passed down.

YES - C) Competition is necessary for natural selection to occur. When those who are more physically fit compete, they are more likely to live against their opponent and therefore pass on the trait of fitness.

NO - D) Although resources are necessary, large amounts are not as it does not lead to fighting over them (scarcity) bringing us back to the need for competition above.

Hope this helped!

what physical structure in animals is similiar to this structure in plants

Answers

Answer:

They are both eukaryotic cells, plant and animal cells are structurally quite similar. The nucleus, mitochondria, endoplasmic reticulum, golgi apparatus, lysosomes, and peroxisomes are all membrane-bound organelles found in both.

Explanation:

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why are vestigial structures not removed by natural selection? A they make the organism fitter B nature selects against only harmful traits C only unimportant structures can be removed D vestigial structures appear only an embryo

Answers

Answer:

B. Nature selects against only harmful traits.

Explanation:

Natural selection only acts on traits that impact reproductive success. Nature chooses against just unsafe attributes. The vestigial structures do not hurt the living being.

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Hope this Helps

Answer:

B. Nature selects against only harmful traits.

Explanation:

1. What did Mendel conclude about genes from parents to offspring?*

Answers

Answer: Paired pea traits

Explanation:

Mendel found that paired pea traits were either dominant or recessive. ... He concluded that traits were not blended but remained distinct in subsequent generations, which was contrary to scientific opinion at the time.

"Paired pea traits" is the correct answer to your question!!

g DNA polymerase is used in PCR to cut DNA sequences into fragments that can then be inserted into vectors. true of false

Answers

Answer:

False

Explanation:

The answer is False.

The DNA polymerase is an enzyme that adds nucleotide bases to the growing chain during the elongation process of DNA replication. It is also utilized in the Polymerase Chain Reaction process to synthesize and amplify the DNA of interest.

Polymerase Chain Reaction is primarily carried out to amplify a DNA of interest in order to be able to study it in careful detail. Cutting of DNA into fragments is carried out by restriction enzyme and this is only done during genetic engineering when a foreign gene is to be inserted into a genome.

provide one term:when businesses produce goods and services that consumers do not want​

Answers

Answer:

Their will be low demand for the goods

Explanation:

Because goods like cigarettes are not much consumed by people

based on this information, scientist could predict that the base _____ pairs with ______ and the base
_____ pairs with ______ in the formation of the DNA molecule

Answers

Based on this information, scientist could predict that the base [tex]\boxed{ adenine }[/tex] pairs with [tex]\boxed{ thymine }[/tex] and the base [tex]\boxed{ cytosine }[/tex] pairs with [tex]\boxed{ guanine }[/tex] in the formation of the DNA molecule.

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Drinking wells must be drilled deeply into the ____ to obtain water? A. Zone of Aeration b . Zone of Saturation. C. Water table

Answers

Answer:

C

Explanation:

The answer would be C

List three Movement for which Absolute Angle of a body segment is important

Answers

Answer:          

Explanation:

abduction/adduction

flexion/extension

internal lexternal rotation.

Explanation:

Answer:

abduction/adduction

flexion/extension

internal lexternal rotation.

Explanation:

how much can your bladder hold before it pops

Answers

Answer:

I posted a couple of pictures for you.

Answer:

Technically speaking, over 2 liters of urine (from patients in hospitals who come in after not having urinated for a week), before pressure causes it to rupture.

Explanation:

Why I say technically is because it is rather rare for someone to simply attempt to hold it until it bursts, this is usually a medical case. If you are not urinating and you're retaining urine, it can cause metabolic abnormalities and electrolyte issues, which can lead to long term kidney failure. A generally healthy bladder can hold between 400 - 500 ml comfortably it reaches it's intended capacity.

Which type of soil is likely to be found
in horizon E?

Answers

Answer:

sandy soil

Explanation:

A layer of pale, sandy soil lacking clay and iron is likely to be found in horizon E.

Glycans are a virulence factor for which group of organisms?
A. fungi
B. viruses
C. bacteria
D. protozoa
E. helminths

Answers

Answer:

C.bacteria

Explanation:

because bacterial glycans are attractive pathogen-specific targets. Bacterial cells are coated with an impressive array of glycan structures that comprise their cell wall

Glycans are a virulence factor for bacteria. So, the correct option is C.

What are Glycans?

Glycans are also known as polysaccharides, are carbohydrate-based polymers made by all living organisms. They are basically chain-like structures that are composed of single sugar molecules (monosaccharides) linked together by chemical bonds.

Now, out of given organisms, only bacterial cell walls are mainly composed of polysaccharides. So, these glycans sites are target sites for disease-causing agents to perform their activity.

Therefore, glycans are a virulence factor for bacteria.

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Which of these is a feature of eons in the geologic time scale? (1 point)
-They are divided into periods.
-They are divided into 100-million-year divisions.
-They are the longest divisions of time.
-They are the shortest divisions of time.

Answers

D. They are in the shortest divisions of time

They are the LONGEST DIVISIONS

of time.

Pictured below is proof that the answer is right, good luck on the final exam!

Which best describes probability?

Answers

A:
the likelihood that something will happen

Which term describe the resting phase of the cell cycle?

Answers

Answer:

interphase.

The interval in the cell cycle between two cell divisions when the individual chromosomes cannot be distinguished, interphase was once thought to be the resting phase but it is far from a time of rest for the cell.

hope this helps<3

which statement dose not describe radioactive atoms

Answers

Answer:

put the picture of the question

Explanation:

please

Which of the following is the most likely reason for a population to decrease?

there is less competition for same resource
the number of prey suddenly increases
the number of predators suddenly decreases
the number of predators suddenly increases

Answers

Answer:

the number of predators suddenly increases

Give me Brainiest answer? Its free!

Answer:

The last one

Explanation:

Its the last one because if there are more predators that means they have to not only fight for food but fight for themselves to stay alive.

Do both roots and leaves store food?

Answers

Answer:

None of them does

Explanation:

the function of the root is to Absorb the water and the leaves to Absorb ligh

Which characteristic distinguishes dwarf planets from planets?
orbits the Sun
is round
is not a moon
has not cleared its orbit of objects

Answers

Answer:

D- has not cleared its orbit of objects

Explanation:

just took it

:))

Answer:

other person is right its D.

Explanation:

A gene that overpowers a weaker gene
A.genotype
B.phenotype
C.dominant
D.recessive

Answers

Answer:

A

Explanation:

because it weak and more weaker then the others in the answer

C. Dominant

A dominant gene (D) will over power a recessive gene (d) only in a heterozygous genotype (Dd) where D is only expressed.

yellow flowered plant is crossed with red one; some of the offspring had orange color phenotype . explain what happened?​

Answers

Answer:

incomplete dominance

Explanation:

the offspring is different from the parent

Which of the following BEST describes the template DNA for the positive control PCR tube in our Wolbachia PCR?

a. The positive control tube receives each kind of template DNA: genomic DNAs from insects known to be and predicted to be positive and negative for Wolbachia infection.
b. The positive control tube receives genomic DNA from an insect known to be positive for Wolbachia infection.
c. The positive control tube receives any genomic DNA from a student's sample that is predicted to be infected with Wolbachia.
d. The positive control tube receives water for template DNA.

Answers

Answer: c. The positive control tube receives any genomic DNA from a student's sample that is predicted to be infected with Wolbachia.

Explanation:

Positive PCR control can be defined as the control sample that is used as a benchmark for comparison with the results of the PCR or polymerase chain reaction. It comprises of artificial genome or primers. For amplification of microbial DNA synthetic oligonucleotides are used as targets of each primer and a hydrolysis probe is also used. As it is already known that primer as well as hydrolysis probe has the specificity for the DNA strand so it will help in identification of the specific region or sequence in the DNA structure. Wolbachia DNA can be detected if the positive control consists of samples of students affected by Wolbachia that can give indication of whether the Wolbachia species is the same as that of the one which has caused infection.

Which statements help explain how Earth formed as part of the solar system? Select the two correct answers. (1 point)
-The denser rocky material in the solar nebula stayed closer to the sun.
-Gaseous planets slowly changed to rocky planets after colliding with meteorites.
-Water and ammonia condensed from gases to ice particles.
-Very large asteroids broke apart to form rocky planets, including Earth.
-The accretion of cosmic dust formed the seeds of planets, including Earth

Answers

The statements 'the accretion of cosmic dust formed the seeds of planets' and 'the denser rocky material in the solar nebula stayed closer to the sun' help explain how Earth formed. It is part of the solar system.

The solar system

The solar system consists of the Sun and eight planets (i.e., Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune).

The solar system is also composed of Pluto (a dwarf planet) many different moons, asteroids, etc.

The solar system formed approximately 4.6 billion years ago from interstellar gas and dust.

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Answer:

The accretion of cosmic dust formed the seeds of planets'
The denser rocky material in the solar nebula stayed closer to the sun

Explanation:

I took the Exam :)

como hago el s3x0
en serio que hago tengo 98 i no se que hacer

Answers

I FOUDN HIM OFFICER HES DIGHT THERE

Panuto: Suriin ang mga halamang ornamental na ito at isulat sa patiang
ang bawat pangalan.
1.
2.
3.
4.
5.
ito ang mga pag pipilian.
calachuchi
fortune plants
rosal
sunflower
gumamila​

Answers

1.fortune plants

2.calachuchi

If someone asked you whether people can be left-brained or right-brained, how might you respond based on what you learned in this activity?

Answers

Answer:

if they write by left hand so they are right brained.

if they write by right hand so they are left brained.

or, the theory is that people are either left-brained or right-brained, meaning that one side of their brain is dominant. If you're mostly analytical and methodical in your thinking, you're said to be left-brained. If you tend to be more creative or artistic, you're thought to be right-brained.

Explanation:

because the right brain is control the left hand

and the left brain is control the right hand

Biodiversity can include genetic diversity within a population or variation of populations within an ecosystem. Given this information, which of the following is likely to have the most biodiversity?
A. a tropical forest
B. an arctic tundra
C. a deciduous forest
D. a residential backyard

Answers

Answer: A= A tropical Forest

Explanation: the largest biodiversity rate is in brizal. And Brizal hold 1/3 of the worlds largest Tropical forest, and 60% of the Amazon Rainforest than the other answers listed

Which letter in the graph indicates a time of decreasing growth?
D
с
Population size
B
А.
Time
O A. D
B. A
C. B
D. C

Answers

Answer:

It would be A

Explanation:

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