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11 August, 00:44

In peas, a gene controls flower color such that R = purple and r = white. In an isolated pea patch, there are 36 purple-flowering plants and 64 white-flowering plants. Assuming Hardy-Weinberg equilibrium, what is the value of q for this population?

a. 0.36.

b. 0.64.

c. 0.75.

d. 0.80.

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  1. 11 August, 04:33
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    D

    Explanation:

    R = Purple,

    r = white

    Let q for recessive allele and p for dominant allele

    p+q=1

    Frequency of q² = 64/100 = 0.64

    So the frequency of the recessive genotype is 0.64, that is, the frequency of qq (q²) is 0.64.

    So by Hardy-Weinberg equilibrium

    Therefore, the frequency of the recessive allele, usually called q, is √0.64 = 0.80
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