An allele evolves that makes rats resistant to poison. heterozygotes are complet

Question

An allele evolves that makes rats resistant to poison. heterozygotes are completely resistant to the poison. homozygotes for the resistance allele die 63% of the time compared to heterozygotes. homozygotes for the wild type allele always die after exposure to the poison. in an area that is routinely exposed to poison, what is the expected equilibrium frequency of the resistance allele?

We are dealing with population genetics at the moment in my evolution class and this is a question on a set of problems given.

Explanation / Answer

Let,

Total Number of homozygotes dominant for resistance allele = 100

Number of homozygotes recessive to the resistance allele = 100

Number of heterozygotes = 100

Number of living homozygotes for resistance allele = 63

Number of heterozygotes living = 100

Number of living recessive homozygotes = 0

Frequency of resistance allele = sqrt( 163 / 300) = 0.737

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