Understanding Evolution : Personal response question
A class of 100 students was tested for the ability to
taste phenylthiocarbamide (PTC). It was found that 50
students could taste it very strongly (genotype TT), 20
students could taste it weakly (genotype Tt), and 30
students could not taste PTC at all (genotype tt). What
is the frequency of the recessive allele, t, in the
population?
a. 0.40
b. 0.50
c. 0.60
d. 0.80