EvolutionEasyBloom L3
Question
A population of organisms has a gene for which there are two alleles, D and d. The allele frequency of D = 0.8. If this population satisfies all five of the Hardy-Weinberg conditions, what are the genotype frequencies expected in the next generation?
Options
A.DD = 0.04; Dd = 0.32; dd = 0.64
B.DD = 0.64; Dd = 0.32; dd = 0.64
C.DD = 0.04; Dd = 0.64; dd = 0.32
D.DD = 0.64; Dd = 0.32; dd = 0.04
Solution
Sol.(d) [Key Concept: Hardy–Weinberg — Genotype Frequencies (p²:2pq:q²)] Given: p (D) = 0.8, so q (d) = 0.2. Using the Hardy-Weinberg equation: p² (DD) = 0.8² = 0.64; 2pq (Dd) = 2 × 0.8 × 0.2 = 0.32; q² (dd) = 0.2² = 0.04. Total = 0.64 + 0.32 + 0.04 = 1.0. Therefore DD = 0.64, Dd = 0.32, dd = 0.04.
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