AP BIOLOGY

EVOLUTION

EVOLUTION OF A POPULATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
In a population of mice, the gray fur phenotype is increasing while the black and white phenotypes are decreasing. This is most likely due to the camouflage afforded to the gray mice on the dusty ground. This is an example of
A
stabilizing selection
B
sexual selection
C
directional selection
D
disruptive selection
Explanation: 

Detailed explanation-1: -Why does the dark fur trait spread so quickly in mice that are on the lava flow? Mice with dark fur survive better and can pass on their genes to offspring.

Detailed explanation-2: -Dark fur color seems to have the greatest selective advantage. On the light-colored substrate, 29% of the mice have dark fur, while only 5% of the mice on the dark-colored substrate have light fur.

Detailed explanation-3: -So, the correct answer is ‘Stabilising natural selection’.

Detailed explanation-4: -The result of this type of selection is increased genetic variance as the population becomes more diverse. Figure 3. In diversifying selection, two or more extreme phenotypes are selected for, while the average phenotype is selected against.

There is 1 question to complete.