Problem

Solutions For An Introduction to Genetic Analysis Chapter 18 Problem 42P

Step-by-Step Solution

Solution 1

In a population, a locus has two alleles A and a. They have frequencies of p and q respectively. The relative genotypic fitnesses are shown in the table below:

Genotype	A/A	A/a	a/a
Relative fitness	1–s	1	1–g

In this population, we see the case of over dominance where heterozygotes have the highest fitness value of 1. Selection against the homozygous AA is s and against homozygous recessive aa is g.

a) If the mean fitness of allele A is equal to the fitness of allele a, then the equilibrium frequency of the allele would be: