First, we need to determine the frequency of the "T" allele in the population. Since the ability to taste PTC is due to a single dominate allele "T", the frequency of the "T" allele can be calculated by the equation:
p = sqrt(# of individuals who can taste PTC / total # of individuals sampled)
p = sqrt(150 / 215) = 0.737
Next, we can calculate the frequency of the homozygous dominant genotype "TT" using the Hardy-Weinberg equation:
p^2 = frequency of TT genotype
(0.737)^2 = 0.543
Since there are only two possible genotypes (TT and Tt), we can calculate the frequency of the heterozygous genotype "Tt" by subtracting the frequency of the TT genotype from 1:
Frequency of Tt genotype = 1 - frequency of TT genotype
Frequency of Tt genotype = 1 - 0.543 = 0.457
Therefore, the frequency of the heterozygous genotype in the population is 0.457 or 45.7%.
The ability to taste PTC is due to a single dominate allele "T". You sampled 215 individuals in biology, and
determined that 150 could detect the bitter taste of PTC and 65 could not. Calculate the frequency of the
heterozygous genotype.
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