Genetic Drift and Population Effects

What is genetic drift?

• A change in allele frequencies due to chance

• A change in allele frequencies due to adaptation

• A change in allele frequencies due to migration

• A change in allele frequencies due to mutation

Which scenario best describes the bottleneck effect?

• A population grows rapidly due to abundant resources.

• A population is drastically reduced by a random event like a natural disaster.

• A small group of individuals leaves to establish a new population in a different area.

• A population adapts to a new environment over many generations.

Which scenario best describes the founder effect?

• A large population migrates to a new, uninhabited area.

• A small group of individuals establishes a new population, and their allele frequencies differ from the original population.

• A sudden decrease in population size occurs due to a disease outbreak.

• An increase in genetic diversity happens within a stable population.

Which type of population is generally more vulnerable to the effects of genetic drift?

• Large populations

• Small populations

• Populations with high genetic diversity

• Populations with low mutation rates