If a trait is at Hardy-Weinberg equilibrium, it should follow the equation p^{2} + 2pq + q^{2} = 1, where p^{2} is the gentoypic frequency for the homozygous dominant, 2pq is for heterozygous frequency, and q^{2} 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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