Question

Stabilizing selection differs from directional selection because a. in the former, phenotypic variation is reduced but the average phenotype stays the same, whereas in the latter both the variation and the mean phenotype change. b. the former requires genetic variation, but the latter does not. c. intermediate phenotypes are favored in directional selection. d. None of the choices is correct.

          Stabilizing selection differs from directional selection because
a. in the former, phenotypic variation is reduced but the average phenotype stays the same, whereas in the latter both the variation and the mean phenotype change.
b. the former requires genetic variation, but the latter does not.
c. intermediate phenotypes are favored in directional selection.
d. None of the choices is correct.

Added by Yolanda D.

Biology for AP Courses

Julianne Zedalis, John Eggebrecht

Instant Answer

Solved by Expert Joanna Quigley

03/16/2022

Step 1

On the other hand, directional selection acts against one extreme and favors the other, leading to changes in both phenotypic variation and the average phenotype. Show more…

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Stabilizing selection differs from directional selection because a. in the former, phenotypic variation is reduced but the average phenotype stays the same, whereas in the latter both the variation and the mean phenotype change. b. the former requires genetic variation, but the latter does not. c. intermediate phenotypes are favored in directional selection. d. None of the choices is correct.