A male and a female are both heterozygous for a particular trait. Which of the following represents the expected ratio of dominant to recessive phenotypes in the offspring?

The given question is incomplete as it lack the options, however, answer can be given by the provided information.

The correct answer is - 3:1 ratio.

Explanation:

In the question it is given that both male and female both are heterozygous for the trait, let assume dominant allele A and recessive allele a so the the gene for the both male and female is Aa.

Punnett square for the cross between both:

gametes: A, a and A, a.

A a

A AA Aa

a Aa aa

here two out of four are heterozygous dominant and one is dominant and one is recessive.

thus, 3 out of 4 are dominant and one out 4 are recessive.

thus, the answer is 3:1 ratio

the correct answer is:

a population changes in response to a change in the environment.