Question

In a Hardy-Weinberg population, the frequency of allele A of gene A $a$ is 0.4. What is the frequency of allele $a$?

• A. 0.6
• B. 0.48
• C. 0.16
• D. 0.36

Answer 1

The correct option is A 0.6

• According to the Hardy-Weinberg principle the gene pool (total genes and their alleles in a population) remains constant. This is called genetic equilibrium. Sum total of all the allelic frequencies is 1.
  
• So, the sum of Allelic frequencies,

A + a = 1
0.4 + a = 1
a = 0.6

So, the correct answer is '0.6'