13. In the following example, assume that the conditions described in class for

ID: 26419 • Letter: 1

Question

13. In the following example, assume that the conditions described in class for the Peppered Moth example (Biston betularia) apply. That is, the dark allele (A) is dominant over the peppered allele (a). Thus, genotypes AA and Aa produce a dark moth and genotype aa produces a peppered moth. Initially gene frequencies are p = 0.4 (dark allele) and q = 0.6 (peppered allele). Suppose that all individuals only mate with those of the same genotype. What are the allele frequencies after this round of non-random mating? Show your work.

Explanation / Answer

genotypes AA and Aa produce a dark moth and genotype aa produces a peppered moth. Initially gene frequencies are p = 0.4 (dark allele) and q = 0.6 (peppered allele). Suppose that all individuals only mate with those of the same genotype. What are the allele frequencies after this round of non-random mating? Show your work.

p = 0.4

0.4 x0.4

0.16

P^2

2pq

2x 0.4 x0.6

0.48

2pq

q = 0.6

0.6 x0.6

0.36

q^2

1.00

By using gene count method

frequencies of p =0.16 + 0.48/2= 0.40---------------------dark allele

frequencies of q =0.36 + 0.48/2= 0.60--------------peppered allele