Biology

The correct answer is: B.Because they represent all possible alleles in the population

Explanation:

In the context of the Hardy-Weinberg equation, p and q represent the frequencies of the two alleles (for example, the dominant allele A and the recessive allele a) for a particular gene in the population. These two alleles are the only possible alleles for that gene in the population, so their total frequency must equal 1.

The equation assumes there are only two alleles at a locus, and the sum of their frequencies reflects all possible genetic variation for that gene. Therefore:

1.p + q = 1, where:

2.p is the frequency of the dominant allele (A),

3.q is the frequency of the recessive allele (a)....