Dr. Nachman and his colleagues collected rock pocket mice across 35-kilometers o
ID: 97474 • Letter: D
Question
Dr. Nachman and his colleagues collected rock pocket mice across 35-kilometers of the Arizona Sonoran Desert that included both dark, rocky lava outcrops and light rocky granite areas. Substrate color and coat color frequencies were recorded for each location. Each site was separated from any of the others by at least 8 kilometers. A total were trapped. His data is summarized below: Calculate the overall frequencies of light-colored mice and dark-colored mice caught on light-colored substrates. Frequency = (number of mice of one color)/(total number of mice) Frequency of dark-colored mice _____ Frequency of light-colored mice _____ Calculate the overall frequencies of light-colored mice and dark mice caught on dark-colored substrates. Frequency (number of mice of one color/total number of mice) Frequency of light-colored mice _____ Frequency of dark-colored mice _____ Using the Hardy-Weinberg equation and data from the table above, determine the number of mice with the DD and Dd genotypes on the rocky, light granite substrate. Frequency of mice with dd genotype on light substrate _____ Frequency of mice with DD genotype on light substrate _____ Frequency of mice with Dd genotype on light substrate _____ Using the Hardy-Weinberg equation and data from the table above, determine the number with the DD and Dd genotypes on the rocky, dark lava substrate. Frequency of mice with dd genotype on dark substrate _____ Frequency of mice with DD genotype on dark substrate _____ Frequency of mice with Dd genotype on dark substrate _____Explanation / Answer
Ans.1) The formula to calculate the frequency is given i.e.
Frequency = number of mice of one color/ total number of mice
Hence,
Frequency of light color mice on light colored substrate= (6+ 80+34)/ (6+85+77) =120/168 =71%
Frequency of dark color mice on light colored substrate= (5+43) / (6+85+77) =48/168 = 29%
2.) Frequency of light color mice on dark colored substrate = (3)/ (7+5+45) = 3/57 = 5%
Frequency of dark color mice on dark colored substrate =(7+5+42)/ (7+5+45) = 54/57 ==95%
3.) By applying the Hardy-Weinberg equation, the number of mice on light granite substrate
Frequency of mice with dd genotype on light substrate would be = 71%
Frequency of mice with DD genotype on light substrate would be = 3%
Frequency of mice with Dd genotype on light substrate would be =26%
4.) By applying the Hardy-Weinberg equation, the number of mice on dark lava substrate
Frequency of mice with dd genotype on light substrate would be = 5%
Frequency of mice with DD genotype on light substrate would be = 61%
Frequency of mice with Dd genotype on light substrate would be =34%
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