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A gene locus has two alleles A, a. If th...

A gene locus has two alleles A, a. If the frequency of dominant allele A is 0.4 then what will be the frequency of homozygous dominant, heterozygous and homozygous recessive individuals in the population

A

0.16 (M), 0.36 (Aa), 0.48 (aa)

B

0.36 (M), 0.48 (Aa), 0.16 (aa)

C

0.16 (M), 0.24 (Aa), 0.36 (aa)

D

0.16 (M), 0.48 (Aa), 0.36 (aa)

Text Solution

Verified by Experts

The correct Answer is:
D
Frequency of dominant allele (p) = .4
Appling Hardy Weinberg equilibrium -
p + q = 1
q = 1 - .4 = .6
`p^2 + q^2 + 2pq = 1`
Frequency of homozygous dominant genotype `(p^2 // A A) = (.4)^2 = .16`
Frequency of Heterozygote `(2pq // Aa) = 2 xx .4 xx .6 = .48`
Frequency of homozygous recessive genotype `(q^2 // a a) = (.6)^2 = .36`
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