APFIVE Hardy-Weinberg Recessive Phenotype Frequency
In a large population that is in Hardy–Weinberg equilibrium, if the frequency of the recessive allele is $$q=0.20$$, what is the expected proportion of individuals expressing the recessive phenotype?
| Allele Frequency | Value |
|---|---|
| Recessive (q) | 0.20 |
A
$$2q = 40\%$$
B
$$q = 20\%$$
C
$$1 - q = 80\%$$
D
$$q^2 = (0.20)^2 = 0.04 \text{ or } 4\%$$
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