Biology

To calculate the percentage of the recessive genotype (which is aa), we use the Hardy-Weinberg equilibrium equation. The frequency of the recessive genotype is represented by , where q is the frequency of the recessive allele.

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 recessive genotype aa using :

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