Three-spined stickleback fish (Gasterosteus aculeatus) show substantial heritable variation in gill-raker length related to differences in their diets. Longer gill rakers appear to function better for capturing open-water prey, while shorter gill rakers function better for capturing shallow-water prey. Which of the following types of selection is most likely to be found in a large lake (open water in the middle and shallow water around the sides) with a high density of these fish?

A) directional selection

B) stabilizing selection

C) disruptive selection

D) sexual selection

Question

Adalynn Preston

Biology

15 December, 15:23

Three-spined stickleback fish (Gasterosteus aculeatus) show substantial heritable variation in gill-raker length related to differences in their diets. Longer gill rakers appear to function better for capturing open-water prey, while shorter gill rakers function better for capturing shallow-water prey. Which of the following types of selection is most likely to be found in a large lake (open water in the middle and shallow water around the sides) with a high density of these fish?

A) directional selection

B) stabilizing selection

C) disruptive selection

D) sexual selection

+3

Answers (1)

Know the Answer?

Coleman Dean · Answer 1

disruptive selection

Explanation:

Disruptive selection -

It is also known as the diversifying selection, it enables to describe the changes in the genetics of the population, in which the trait that is favored is the extreme over the intermediate values.

In case of disruptive selection, the trait variance increases and the population is distributed into two groups.

And, in this case the more individual acquire the peripheral character value in the both ends of distribution curve.

Hence, from the information of the question, the correct answer is disruptive selection.