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A population of diploid organisms is at Hardy-Weinberg equilibrium. If the frequency of allele A is 0.1, the frequency o…

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A population of diploid organisms is at Hardy-Weinberg equilibrium. If the frequency of allele A is 0.1, the frequency of AA is ___________.

[Re-NEET 2026]

a

0.01

b

0.02

c

0.10

d

0.99

✓ Correct answer: a)

0.01

Explanation

For a population in Hardy–Weinberg equilibrium:

\({p}^{2}+2pq+{q}^{2}=1\)

Where:

  • \(p\) = frequency of allele A
  • \(q\) = frequency of allele a
  • \({p}^{2}\) = frequency of genotype AA
  • \(2pq\) = frequency of genotype Aa
  • \({q}^{2}\) = frequency of genotype aa

Given: \(p=0.1\)

Frequency of AA genotype: \(AA={p}^{2}\)\(=(0.1{)}^{2}\)\(=0.01\)

Therefore, the frequency of AA = 0.01.

Correct Answer: Option A (0.01)

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