In the Hardy-Weinberg equation, what does "p" represent?

• A. Frequency of recessive allele
• B. Frequency of a particular genotype
• C. Frequency of dominant allele
• D. Total population size

Answer: (C)

In the Hardy-Weinberg equation, "p" specifically represents the frequency of the dominant allele in a population. This is a fundamental concept in population genetics which helps to understand allele frequencies and genetic variation within a population at equilibrium. The equation is expressed as p² + 2pq + q² = 1, where "p" is the frequency of the dominant allele, "q" is the frequency of the recessive allele, p² represents the frequency of the homozygous dominant genotype, 2pq represents the frequency of the heterozygous genotype, and q² represents the frequency of the homozygous recessive genotype. By using "p" to denote the dominant allele's frequency, it allows researchers to predict how allele frequencies will change over generations under certain conditions, given that the population is not evolving.