Biology

To calculate the percentage of the heterozygous dominant genotype (which would be represented as Aa), we need to use the Hardy-Weinberg equation. Specifically, the frequency of the heterozygous dominant genotype is given by 2pq, where:

1.p is the frequency of the dominant allele A,

2.q is the frequency of the recessive allele a.

You are given that p = 0.20. To find q, we use the equation p + q = 1, so:

q = 1 - p = 1 - 0.20 = 0.80

Now, we can calculate the frequency of the heterozygous genotype Aa using 2pq: