If a trait is at Hardy-Weinberg equilibrium, it should follow the equation p2 + 2pq + q2 = 1, where p2 is the gentoypic frequency for the homozygous dominant, 2pq is for heterozygous frequency, and q2 is for homozygous recessive frequency.
Suppose you are investigating an autosomal recessive disease known as "studious toxicosis" which occurs at a rate in the American college student population of 1 in 16 individuals. Students who inherited two recessive alleles (tt) have the disease. If we assume Hardy-Weinberg equilibrium in a large population of college students, what is the percentage of heterozygous carriers of the studious toxicosis allele in the population?
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