In a population of gerbils, long hair (H) is completely dominant over short hair (h). If 18% of the population has short hair, calculate the percentage of the population that is expected to be heterozygous (Hh) ...?

Question

Biology

Paisley Stein

6 April, 02:36

In a population of gerbils, long hair (H) is completely dominant over short hair (h). If 18% of the population has short hair, calculate the percentage of the population that is expected to be heterozygous (Hh) ...?

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Karina Banks · Answer 1

Below are the choices that can be found elsewhere:

A) 29%

B) 58%

C) 80%

D) 49%

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

And q + p = 1

You have q^2 which is 0.18, which stands for the homozygous recessive. p^2 is homozygous dominant percentage while 2pq is what you're looking for, heterozygous.

Anyway to find your answer, square root q^2 to find q, then you can use q+p=1 to find p. Then use 2pq to find the percent of heterozygotes. The answer for your question is D.