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AP Biology/Unit 7: Natural Selection
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Hardy-Weinberg Recessive Phenotype Frequency

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In a large population in Hardy-Weinberg equilibrium, the frequency of a recessive allele is q=0.20q=0.20. What is the expected frequency of individuals expressing the recessive phenotype?

A

1−q=80%1 - q = 80\%

B

2q=40%2q = 40\%

C

q2=(0.20)2=0.04 or 4%q^2 = (0.20)^2 = 0.04 \text{ or } 4\%

D

q=20%q = 20\%

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