In a species of salamander,there are two forms,red and yellow.As the yellow form becomes less common due to predation and the red form more common,the yellow form becomes less likely to be eaten and more likely to survive and reproduce.The yellow form then becomes more common and roles of red and yellow forms reverse.This is an example of
A)negative frequency-dependent selection.
B)directional selection.
C)disruptive selection.
D)balancing selection.
E)intrasexual selection.

Question

Quizplus · Accepted Answer

This is an example of negative frequency-dependent selection, where the fitness of a phenotype decreases as it becomes more common in the population. As the yellow form becomes less common, it becomes less likely to be preyed upon and its fitness increases, making it more likely to survive and reproduce. However, as the yellow form becomes more common, its fitness again decreases, and the roles of the red and yellow forms reverse.

In a Species of Salamander,there Are Two Forms,red and Yellow