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A population of organisms has a gene for which there are two alleles, D and d. The allele frequency of D = 0.7. If this population satisfies all five Hardy-Weinberg conditions, what are the genotype frequencies that are expected in the next generation?

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DD = 0.09, Dd = 0.42, dd = 0.49

DD = 0.49, Dd = 0.09, dd = 0.42

DD = 0.09, Dd = 0.49, dd = 0.42

DD = 0.49, Dd = 0.42, dd = 0.09

answer is D.

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Detailed Solution

D (p) = 0.7, DD = ${(0.7)}^{2}$ = 0.49

Based on p+q=1,

d (q) = 0.3, dd = ${(0.3)}^{2}$ = 0.09

Dd = 2pq = 2 $\times$ 0.7 $\times$ 0.3 = 0.42

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