Suppose there are two alleles at a locus and that the locus is at Hardy-Weinberg equilibrium.If the frequency of one allele is r, what is the frequency of the heterozygotes? A) r² B) (1 - r)² C) r × (1 - r) D) 2r × (1 - r) E) r² × (1 - r)

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The frequency of heterozygotes in a population at Hardy-Weinberg equilibrium is given by 2pq, where p and q are the frequencies of the two alleles. If the frequency of one allele is r, then the frequency of the other allele is 1 - r. Therefore, the frequency of the heterozygotes is 2r × (1 - r).

Suppose There Are Two Alleles at a Locus and That