AP Biology· difficulty 3/5
On the Hardy-Weinberg graph above, the heterozygote frequency 2pq is maximized when
p = 0 or 1 (one allele fixed)
p > 0.9 (dominant allele common)
Heterozygotes are always rare
p = q = 0.5 (alleles equally common)
Explanation
Maximum 2pq is at p = q = 0.5, giving 2(0.5)(0.5) = 0.5 (heterozygotes peak at half the population).
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