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KVPY Sample Paper KVPY Stream-SX Model Paper-24

  • question_answer
    Red hair is a recessive trait in humans, in a randomly mating population in Hardy-Weinberg equilibrium, approximately 9% of individuals are red-haired. What is the frequency of heterozygotes?

    A) \[81%\]

    B) \[49%\]

    C) \[42%\]

    D) \[18%\]

    Correct Answer: C

    Solution :

    Let  \[{{q}^{2}}\] represent the frequency of red-haired individuals. Given, Frequency of red-haired individuals \[({{q}^{2}})\]
    =9/100
    =0.09
    \[q=\sqrt{0.09}=0.3\]
    \[p=1-q\]
    \[=1-0.03\]
    =0.7
    Frequency of heterozygous individuals
    \[(2pq)=2\times 0.7\times 0.3=0.42=42%\]


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