From a population of 200 diploid individuals, genotype counts are: 80 $AA$, 96 $Aa$, and 24 $aa$. What is the frequency of allele $a$?

Step-by-step solution

1. Count the number of $a$ alleles: $2\times 24+96=48+96=144$.
2. Count the total number of alleles: $2\times 200=400$.
3. Divide the number of $a$ alleles by total alleles: $144/400=0.36$.
4. Thus the allele frequency of $a$ is 0.36.

Concept tested: Allele frequency calculation

Published 1 October 2026 · How this solution was prepared and checked