9C - Genetic Drift and Gene Flow

Question 1

genetic drift

Answer 1

Random changes in allele frequencies due to sudden/random events

Question 2

mechanisms of g.drift

Answer 2

bottleneck and founder effect

Question 3

bottleneck effect

Answer 3

A random event largely reduces population size, decreasing genetic diversity

Question 4

founder effect

Answer 4

A small unrepresentative group forms a new population with lower genetic diversity.

Question 5

Impacts of Genetic Drift

Answer 5

Reduces genetic diversity.

Inbreeding: Harmful alleles remain in the population.

Lower Adaptive Potential

Smaller populations are more affected

Question 6

gene flow

Answer 6

Movement of alleles between populations through migration or interbreeding of individuals between two populations

Question 7

mechanisms of g.flow

Answer 7

Immigration: Adds alleles, increasing genetic diversity

Emigration: Removes alleles, decreasing genetic diversity.

Interbreeding: Introduces new alleles permanently.