Multiple Choice
In the context of Hardy-Weinberg equilibrium, what does allele frequency refer to in a population?
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21. Population Genetics
Hardy Weinberg
Multiple Choice
In a population at Hardy–Weinberg equilibrium, the frequency of allele is and the frequency of allele is (with ). What is the expected genotype frequency of ?
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Verified step by step guidance1
Recall that in a population at Hardy–Weinberg equilibrium, the allele frequencies are represented as \(p\) for allele \(C\) and \(q\) for allele \(c\), with the relationship \(p + q = 1\).
Understand that the Hardy–Weinberg principle predicts genotype frequencies based on these allele frequencies: the frequency of the homozygous dominant genotype \(CC\) is \(p^2\), the heterozygous genotype \(Cc\) is \$2pq\(, and the homozygous recessive genotype \)cc\( is \)q^2$.
Identify that the problem asks for the expected genotype frequency of the homozygous recessive genotype \(cc\), which corresponds to the frequency of having two copies of allele \(c\).
Use the Hardy–Weinberg formula for the homozygous recessive genotype frequency: \(q^2\).
Therefore, the expected genotype frequency of \(cc\) in the population is given by \(q^2\).
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