Answer: Option B
:
B
The Hardy-Weinberg equation is expressed as: $p^2+2pq+q^2=1$, where p is the frequency of the dominant allele (for instance, A) and q is the frequency of the recessive allele (for instance, a) in the population. In the equation, $p^2$represents the frequency of the homozygous dominant genotype (AA in this case), $q^2$represents the frequency of the homozygous recessive genotype (aa), and 2pq represents the frequency of the heterozygous genotype (Aa).