Which of the following genotype frequencies of AA Aa and aa

Which of the following genotype frequencies of AA, Aa and aa, respectively, satisfy the Hardy-Weinberg principle?

a.

0.29, 0.42, 0.29

b.

0.64, 0.27, 0.09

c.

0.33, 0.33, 0.33

d.

0.36, 0.55, 0.09

e.

0.49, 0.42, 0.09

Please explain how you got the answer

Solution

e. 0.49, 0.42, 0.09

The frequency of AA is = 0.49

Thus, the frequency of dominant allele, A is = 0.7

The frequency of aa is = 0.09

The frequency of recessive allele, a = 0.3

The frequency of heterozygous genotype, Aa = 2*0.7*0.3 = 0.42