Identify the effect(s) of specific population-genetic forces on genetic variation within and between populations over time....

Identify the effect(s) of specific population-genetic forces on genetic variation within and between populations over time. In each of the table cells, choose one of the options in the drop-down menu that appears.

	Genetic variation within a population	Genetic variation between multiple populations
Mutation	[ Select ] ["increases", "decreases", "can either increase or decrease", "stays the same"]	[ Select ] ["increases", "decreases", "can either increase or decrease", "stays the same"]
Migration	[ Select ] ["increases", "decreases", "can either increase or decrease", "stays the same"]	[ Select ] ["increases", "decreases", "can either increase or decrease", "stays the same"]
Genetic drift	[ Select ] ["increases", "decreases", "can either increase or decrease", "stays the same"]	[ Select ] ["increases", "decreases", "can either increase or decrease", "stays the same"]
Natural selection	[ Select ] ["increases", "decreases", "can either increase or decrease", "stays the same"]	[ Select ] ["increases", "decreases", "can either increase or decrease", "stays the same"]

In a large, randomly-mating population, the frequency of the allele (a) for sickle-cell hemoglobin is 0.028. The results of studies have shown that people with the following genotypes at the beta-chain locus produce the average numbers of offspring given. In the table below, indicate the relative fitness values for these three genotypes.

Genotype	Mean offspring	Relative fitness
AA	5	[ Select ] ["0", "1", "0.83"]
Aa	6	[ Select ] ["0", "1", "0.83"]
aa	0	[ Select ] ["0", "1", "0.83"]

What form of selection is acting on the sickle-cell allele? [ Select ] ["directional selection against the a allele", "directional selection against the A allele", "overdominance", "underdominance"]

Over time, we should expect genetic variation in this population to [ Select ] ["increase", "decrease", "stay the same"] .

Expert Solution

All the answers are provided in the pictures above.

gladiator answered 1 year ago

Genetic variation is the difference in DNA sequences between individuals within a population. The human genome...

Genetic variation is the difference in DNA sequences between individuals within a population. The human genome has about 3 × 109 base pairs of DNA, and between any two humans, the amount of genetic variation is about 0.1%. In other words, about 1 bp in every 1,000 bp of DNA will be different between two random individuals. Any two individuals have about 6 × 106 base pairs that are different. Therefore, we can say that there is considerable genetic variation...

What are the three addítional sources of genetic variation within sexually reproducing populations?

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a. Explain how genetic drift can lead to a reduction in the genetic variation within a population.

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why is there genetic variation? what processes shape the genetic structure of populations?

why is there genetic variation? what processes shape the genetic structure of populations? what causes populations to be different? what causes divergence?

Answer parts a and b in regards to natural selection and variation within and between populations....

Answer parts a and b in regards to natural selection and variation within and between populations. Be clear about which part you are answering. a. How does natural selection impact variation within a population? b. How does natural selection impact variation between populations; be specific about this answer (Hint: there's more than one option here).

1. How does sustained directional selection affect the amount of genetic variation within a population?

1. How does sustained directional selection affect the amount of genetic variation within a population? A. The amount of genetic variation increases. B. The amount of genetic variation decreases. C. The amount of genetic variation stays the same. 2. Which of the following hypothetical populations is most likely to be mating assortatively at the M locus? Numbers refer to observed percentages of each genotype. A. 81 MM, 18 Mm, 1 mm B. 25 MM, 50 Mm, 25 mm C. 20 MM, 20 Mm, 60 mm D. 20 MM,...

What principal type of selection increases the amount of genetic variation within a population? Name two...

What principal type of selection increases the amount of genetic variation within a population? Name two that decrease genetic diversity & explain why.

Natural selection tends to reduce genetic variation within a population by disfavouring particular alleles. However, in...

Natural selection tends to reduce genetic variation within a population by disfavouring particular alleles. However, in some situations selection can help maintain genetic variation rather than erode it. Explain how this can happen using an example.

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