Question

1. a gene pool in a population of jackrabbits in a field remained constant for many generations. the most probable reason for this stable gene pool is that:

marks : 1.00
b. no migration occurred in a small population with random mating and no mutations.
a. no migration occurred in a large population with random mating and no mutations.
c. no migration occurred in a large population and no mutations but mating was non-random.
d. there was much migration into and out of the large population,

Explanation:

To have a stable gene pool (Hardy - Weinberg equilibrium), the conditions are a large population (to minimize genetic drift), no migration (to prevent gene flow), random mating (no sexual selection), no mutations (to prevent new alleles), and no natural selection. Option A meets these conditions. Option B has a small population (prone to genetic drift), Option C has non - random mating (disrupts equilibrium), and Option D has migration (gene flow disrupts equilibrium).

Answer:

A. No migration occurred in a large population with random mating and no mutations.