If the frequency of the recessive allele (q) for a particular two-allele gene in a population is 0.20, what percentage of the individuals in the population will be heterozygotes for that gene?

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Quizplus · Accepted Answer

The percentage of heterozygotes can be calculated using the Hardy-Weinberg principle, which is 2pq, where p is the frequency of the dominant allele and q is the frequency of the recessive allele. Given q = 0.20, p = 1 - q = 0.80. Therefore, 2pq = 2(0.80)(0.20) = 0.32 or 32%.

If the Frequency of the Recessive Allele (Q) for a Particular