where p generally represents the frequency of the homozygous dominant population.
The q usually represents the frequency of the homozygous recessive population, and the 2pq term represents the frequency of the heterozygous population.
"p" represents the allele frequency of dominant homozygous (AA) individuals.
Explanation:
The Hardy-Weinberg principle establishes that, for a given pair of alleles with frequencies p and q, in a balanced Mendelian population, the frequency of the different genotypes in each generation will be in accordance with the expression p2 + 2pq + q2 = 1.
In this equation "p" represents the allele frequency of dominant homoxygote individuals (AA), "pq" represents the allele frequency of heterozygous individuals (Aa), "q" represents the allele frequency of individual recessive homozygotes (aa).