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Hardy Weinberg Problem

Assume that left-handedness is a recessive trait controlled by one pair of dominant-recessive alleles. If 625 of 2,500 individuals in a sample of a population is left-handed, and if the population is in Hardy-Weinberg equilibrium, how many individuals in the entire population of 10,000 would be predicted to be heterozygous for the trait?

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q^2 = 625/2500 = 0.25 (25%) of the population is left handed.

Therefore q = ...