Question

You are a geneticist studying the population genetics of red fire ants. You are particularly interested in one gene for which the species has two alleles: D and d. Upon examining the alleles present in 1000 individuals, you find that the D allele is very common, with an allele frequency of 0.6. Therefore, you calculate that there are a total of 600 d alleles present in the population. Kaufman, an ecologist studying deer mice, was interested in whether a mouse's coat color influences its risk of predation. He suspected that mice whose coat color matches the color of the soil in its environment will be caught less often by visually-oriented predators than those whose coat does not match the soil color. To test his hypothesis, he put equal numbers of light and dark mice in both light and dark soil color enclosures. He then recorded which color of mouse was captured first by an owl in each enclosure. His results are shown in the following table: Dark Soil Coat Color of Mice % of the time caught first Dark 37% Light 63% Light Soil Coat Color of Mice % of the time caught first Dark 64% Light 36% The null hypothesis for this experiment is: Camouflaged mice are caught less frequently by owls than those whose coats do not match the soil. To determine if there is a significant difference in the catch rate of dark mice on light soil and dark mice on dark soil, you conduct a t-test. You get a p-value of 0.04. Based on this information, you conclude that there is a statistically significant difference between the catch rate of dark mice on dark soil and that of dark mice on light soil. The pangolin is a small scaled mammal found in Africa and Asia. There are eight species globally and two of them are critically endangered, the result of severe population bottlenecks caused by overharvesting by humans for meat and for their scales. The effect of a bottleneck on the genetic diversity of the affected population would be that genetic diversity would be less than in the original population. A goldfinch has a range of feather color variation displayed by males. The feather colors range from a dull yellow that allows them to blend into their preferred habitat to a bright yellow that is very obvious. The adult females are also dull colored. The predation rate for bright yellow males is three times higher than for the dull-colored males. Despite this, the bright yellow plumage persists in the population. Based on survival alone, the pattern of selection you would expect to see over time in the population of male goldfinches is directional selection toward dull yellow plumage.

Name: you are a geneticist studying the population genetics of red fire ants you are particularly interested in one gene for which the species has two alleles d and d upon examining the alleles pr 02572
Uploaded: 2023-09-08T04:55:46-08:00
Duration: 2 min 50 s
Channel: Adi S
Description: you are a geneticist studying the population genetics of red fire ants you are particularly interested in one gene for which the species has two alleles d and d upon examining the alleles pr 02572

Kaufman, an ecologist studying deer mice, was interested in whether a mouse's coat color influences its risk of predation. He suspected that mice whose coat color matches the color of the soil in its environment will be caught less often by visually-oriented predators than those whose coat does not match the soil color. To test his hypothesis, he put equal numbers of light and dark mice in both light and dark soil color enclosures. He then recorded which color of mouse was captured first by an owl in each enclosure. His results are shown in the following table:

Dark Soil
Coat Color of Mice
% of the time caught first
Dark
37%
Light
63%

Light Soil
Coat Color of Mice
% of the time caught first
Dark
64%
Light
36%

The null hypothesis for this experiment is: Camouflaged mice are caught less frequently by owls than those whose coats do not match the soil.

To determine if there is a significant difference in the catch rate of dark mice on light soil and dark mice on dark soil, you conduct a t-test. You get a p-value of 0.04. Based on this information, you conclude that there is a statistically significant difference between the catch rate of dark mice on dark soil and that of dark mice on light soil.

The pangolin is a small scaled mammal found in Africa and Asia. There are eight species globally and two of them are critically endangered, the result of severe population bottlenecks caused by overharvesting by humans for meat and for their scales.

The effect of a bottleneck on the genetic diversity of the affected population would be that genetic diversity would be less than in the original population.

A goldfinch has a range of feather color variation displayed by males. The feather colors range from a dull yellow that allows them to blend into their preferred habitat to a bright yellow that is very obvious. The adult females are also dull colored. The predation rate for bright yellow males is three times higher than for the dull-colored males. Despite this, the bright yellow plumage persists in the population.

Based on survival alone, the pattern of selection you would expect to see over time in the population of male goldfinches is directional selection toward dull yellow plumage.

Added by Karen S.

Biology for AP Courses

Julianne Zedalis, John Eggebrecht

Instant Answer

Solved by Expert Adi S

09/08/2023

Step 1

Since the allele frequency of D is 0.6 and there are 1000 individuals in the population, the number of individuals with the D allele can be calculated as follows: Number of individuals with D allele = 0.6 * 1000 = 600 individuals ** Show more…

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You are a geneticist studying the population genetics of red fire ants. You are particularly interested in one gene for which the species has two alleles: D and d. Upon examining the alleles present in 1000 individuals, you find that the D allele is very common, with an allele frequency of 0.6. Therefore, you calculate that there are a total of 600 d alleles present in the population. Kaufman, an ecologist studying deer mice, was interested in whether a mouse's coat color influences its risk of predation. He suspected that mice whose coat color matches the color of the soil in its environment will be caught less often by visually-oriented predators than those whose coat does not match the soil color. To test his hypothesis, he put equal numbers of light and dark mice in both light and dark soil color enclosures. He then recorded which color of mouse was captured first by an owl in each enclosure. His results are shown in the following table: Dark Soil Coat Color of Mice % of the time caught first Dark 37% Light 63% Light Soil Coat Color of Mice % of the time caught first Dark 64% Light 36% The null hypothesis for this experiment is: Camouflaged mice are caught less frequently by owls than those whose coats do not match the soil. To determine if there is a significant difference in the catch rate of dark mice on light soil and dark mice on dark soil, you conduct a t-test. You get a p-value of 0.04. Based on this information, you conclude that there is a statistically significant difference between the catch rate of dark mice on dark soil and that of dark mice on light soil. The pangolin is a small scaled mammal found in Africa and Asia. There are eight species globally and two of them are critically endangered, the result of severe population bottlenecks caused by overharvesting by humans for meat and for their scales. The effect of a bottleneck on the genetic diversity of the affected population would be that genetic diversity would be less than in the original population. A goldfinch has a range of feather color variation displayed by males. The feather colors range from a dull yellow that allows them to blend into their preferred habitat to a bright yellow that is very obvious. The adult females are also dull colored. The predation rate for bright yellow males is three times higher than for the dull-colored males. Despite this, the bright yellow plumage persists in the population. Based on survival alone, the pattern of selection you would expect to see over time in the population of male goldfinches is directional selection toward dull yellow plumage.