Genetic Drift

Question 1

1.

Answer 1

Change in allele frequency happens by chance (not natural selection). More likely to occur in smaller populations.

Question 2

2.

Answer 2

A few individuals may produce more offspring than survive (by chance) especially when selection pressures are not strong.

Question 3

3.

Answer 3

Their alleles are passed on and increase in the population.

Question 4

4.

Answer 4

Genetic drift is more likely to occur in island populations and therefore there is more interbreeding.

Question 5

5.

Answer 5

This decreases the gene pool. As it is a small population, over generations only one allele of a gene may be present.