If an allele makes up one half of the frequency of a population’s allele for a given trait, its allele frequency is
a. 100 percent.
b. 75 percent.
c. 50 percent.
d. 4 percent.

If an allele makes up one half of the frequency of a population’s allele for a given trait, its allele frequency is 50 percent. The correct option among all the options that are given in the question is the third option or option "C". I hope that this is the answer that you were looking for and it has come to your help.