The recessive phenotype of a trait occurs in 20% of a population.There are no selection pressures affecting this trait.What would be the expected frequency of the heterozygote genotype after six generations of continued non-selection?
A)0.2
B)0.306
C)0.447
D)0.494
E)0.553

Question

Quizplus · Accepted Answer

The recessive phenotype frequency (q^2) is 0.2, so q = √0.2 ≈ 0.447. The frequency of the dominant allele (p) is 1 - q ≈ 0.553. The heterozygote frequency (2pq) is 2 * 0.553 * 0.447 ≈ 0.494.

The Recessive Phenotype of a Trait Occurs in 20% of a Population.There