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9 November, 01:31

Full color (D) in domestic cats is dominant over dilute color (d). Out of 325 cats observed, 194 have full color and 131 have dilute color. If these cats are in Hardy-Weinberg equilibrium for the dilution locus, calculate the frequency of the d allele. Use three decimal places for your answer.

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  1. 9 November, 02:10
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    frequency of d allele = 0.635

    Explanation:

    If p = frequency of dominant allele and q = frequency of recessive allele

    According to Hardy-Weinberg equilibrium:

    p + q = 1 and p² + 2pq + q² = 1

    where p² = frequency of homozygous dominant genotype

    q² = frequency of homozygous recessive genotype

    and 2pq = frequency of heterozygous genotype

    Here,

    q² = d² = 131/325 = 0.403

    so q = d = √0.40 = 0.6348 = 0.635

    Hence frequency of d allele = 0.635
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