Final answer:
The equation p + q = 1.0 represents the frequencies of different alleles in a population and is part of the Hardy-Weinberg model of population genetics. Hence the correct answer is option A
Step-by-step explanation:
The equation p + q = 1.0 represents the frequencies of different alleles in a population. Population geneticists use this equation to represent the frequency of the dominant allele (p) and the frequency of the recessive allele (q) for a given locus in the population. If p and q are the only two possible alleles for that locus, their frequencies will add up to 1.0. This equation is part of the Hardy-Weinberg model of population genetics.
Hence the correct answer is option A