Question

If the frequency of a dominant phenotype in a stable population is 75%, the frequency of recessive allele in that population would be
A. 0.375
B. 0.75
C. 0.094
D. 0.5

Answer 1

Correct Answer - D
The given frequency of a dominant phenotype is 75% and, therefore, its recessive will be 25%. 75:25 i.e, 3:1 ratio which is AA,Aa,Aa,aa. Here allele A: a is 4:4 i.e., 50:50.