Question

Presence of recessive trait is $16\%$. The frequency of dominant allele in population is

• A. $0.6$
• B. $0.32$
• C. $0.84$
• D. $0.92$

Answer 1

The correct option is A $0.6$

Let's start with the basic Hardy-Weinberg equations first.

p+q=1 and p^2+2pq+q^2=1

With "p" being the dominant allele and "q" being the recessive allele

We know that 16% (or 0.16) show the recessive trait. This means that the fraction of the population with the recessive trait,

q^2 is 0.16

With the value for q^2, q can be calculated. What follows is that q=0.4

With this knowledge "p" can be calculated, 1−q=p, which results in "p" being 0.6

This 0.6 is the frequency at which the dominant allele is present in the population.

So, the correct answer is '0.6'.