Q153 / 180 · AIIMS 2018 (26 May) · Zoology

In a population of 1000 individuals, 360 belong to genotype AA, 480 to $\mathrm{Aa}$ and the remaining 160 to aa. Based on this data, the frequency of allele $A$ in the population is

  • A
    $0.4$
  • B
    $0.5$
  • Correct answer
    C
    $0.6$
  • D
    $0.7$

Solution

(c) : According to Hardy Weinberg principle $\mathrm{p}^2+2 \mathrm{pq}+\mathrm{q}^2=1 ;(\mathrm{p}+\mathrm{q})^2=1$ (AA) $\mathrm{p}^2=360$ out of 1000 individuals or $\mathrm{p}^2=0.36$ Therefore, $\mathrm{p}=0.6$.

Hence, the correct answer is option: 'C'.

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