Passage VI
Tasters are people who can taste Chemical P. Nontasters are people who cannot taste Chemical P. The ability to taste Chemical P is determined by Gene T, which has 2 alleles: T and t. In a population that is not evolving—a population in Hardy-Weinberg equilibrium (HWE)—the frequency of allele T is p and the frequency of allele t is q. Table 1 shows the Gene T genotype(s) of tasters and of nontasters and the expression that predicts the frequency of each genotype in a population in HWE. Table 2 shows p, q, and the frequency of each Gene T genotype for 4 populations in HWE.
35. People that are heterozygous for Gene T are most common in the population for which p is:
Your Answer is
Correct Answer is C
Explanation
heterogeneous heterozygous, that is, the genotype is Tt. So looking at table 2, Population 1 has the highest Tt frequency, that is, p=q=0.5