Question

1. suppose there is a population of rabbits. the color of the rabbits is governed by two incompletely dominant traits: black fur (b) and white fur (b). a rabbit with the genotype of \bb\ would have black fur, a genotype of \bb\ would have gray fur, and a genotype of \bb\ would have white fur. what type of selection would occur if this population migrated to an area that had very dark rocks as well as white colored stone?

a) directional selection
b) stabilizing selection
c) disruptive selection

1. which evolutionary pattern is characterized by long periods of stability followed by sudden bursts of change?

a) gradualism
b) punctuated equilibrium
c) genetic drift

Explanation:

For Question 13:

Disruptive selection favors extreme phenotypes over intermediate ones. In this environment, black rabbits (BB) are camouflaged on dark rocks, white rabbits (bb) on white stones, while gray rabbits (Bb) are more visible to predators, so the extreme traits are selected for.

For Question 14:

Punctuated equilibrium describes evolutionary patterns where species stay stable (in equilibrium) for long periods, then undergo rapid, sudden bursts of evolutionary change. Gradualism is slow, steady change, and genetic drift is random allele frequency change.

Answer:

1. c) Disruptive Selection
2. B) Punctuated equilibrium