population genetics

Question 1

what is the founder effect?

Answer 1

a change in gene pool that occurs when a few individuals start a new isolated population (isolating traits from the parent population)
- new population may be phenotypically and genotypical different from parents

Question 2

what is the bottleneck effect?

Answer 2

disasters reduce the population & gene pool
- decreases the variation in the population, and can eliminate alleles all together

Question 3

what is gene flow and its impact?

Answer 3

Gene flow is the movement of genes into or out of a population
- reduces genetic differences between populations

Question 4

give an example of gene flow and how it can lead to increased prevalence of certain traits in a population

Answer 4

• pollen transfer in plants
• the movement of pollen from one flower to another to reproduce a new plant
• the parent traits will continue to be passed down in generations, therefore increasing prevalence of those traits