A recessive disorder affects 1 in 2500 people in a population in Hardy-Weinberg equilibrium. What is the approximate frequency of carriers?
Correct answer C. 0.039
Explanation
q² = 1/2500 = 0.0004, so q = 0.02 and p = 0.98. Carrier frequency = 2pq = 2 × 0.98 × 0.02 ≈ 0.039, roughly 1 in 26 people.
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