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KVPY Sample Paper KVPY Stream-SX Model Paper-22

  • question_answer
    A gene locus has two alleles A, a. If the frequency of dominant allele A is 0.4, then what will be the frequency of homozygous dominant, heterozygous and homozygous recessive individuals in the population?

    A) 0.36(AA); 0.48 (Aa); 0.16 (aa)

    B) 0.16(AA); 0.24 (Aa); 0.36 (aa)

    C) 0.16(AA); 0.48 (Aa); 0.36 (aa)

    D) 0.16(AA); 0.36 (Aa); 0.48 (aa)

    Correct Answer: C

    Solution :

    Frequency of dominant allele (say p) = 0.4
    Frequency of recessive allele (say q) \[=1-0.4=0.6\]
    \[\therefore \] Frequency of homozygous dominant individuals (AA) \[={{p}^{2}}={{(0.4)}^{2}}=0.16\]
    Frequency of heterozygous individuals (Aa) \[=2pq=2(0.4)(0.6)=0.48\]
    Frequency of homozygous recessive individuals (aa)


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