In a population of 500 diploid individuals, 200 are homozygous dominant (AA), 200 are heterozygous (Aa), and 100 are homozygous recessive (aa). Find the frequency of allele a.

Step-by-step solution

1. Count total number of alleles: $2N=1000$.
2. Count alleles a: $2\times 100+1\times 200=400$.
3. Divide by total alleles: $400/1000=0.4$.
4. Hence frequency of $a$ is $0.4$.

Concept tested: Allele frequency calculation

Published 28 September 2026 · How this solution was prepared and checked