Answer:
The proportion of the population that is homozygous for the non-wiggling allele is 0.3056.
Step-by-step explanation:
Denote the variables as follows:
<em>q²</em> = number of people who are homozygous for the scalp-wiggling allele.
<em>p²</em> = number of people who are homozygous for the non-wiggling allele.
It is provided that the proportion of the population who are homozygous for the scalp-wiggling allele is, <em>q²</em> = 0.20.
Compute the value of <em>q</em> as follows:

Compute the value of <em>p</em> as follows:

Compute the proportion of the population who are homozygous for the non-wiggling allele as follows:

Thus, the proportion of the population that is homozygous for the non-wiggling allele is 0.3056.