Causes of Changes in the Gene Pool

Question 1

Genetic drift

Answer 1

a change in allele frequencies caused by chance events in a small gene pool, such as inbreeding caused by the isolation of a small non-representative group pf a few non-breeding individuals (bachelors). Founder effect and bottleneck effect are examples of genetic drift

Question 2

Founder effect

Answer 2

a type of genetic drift that occurs when a small population that is not representative of the remain population migrates away. Allele frequencies of the two groups will be dissimilar

Question 3

Bottleneck effect

Answer 3

a type of genetic drift similar to the founder effect; occurs when a natural disaster thins the population to a small group that happens to be unrepresentative of the original group. Allele frequencies of the two groups will be dissimilar

Question 4

Mate selection (non-random mating)

Answer 4

the process of choosing mates based on the presence of certain traits or phenotypes and, thus, genotypes. Traits are usually displays in some form of courtship ritual

Question 5

Fecundity

Answer 5

Fertility

Question 6

Mortality

Answer 6

death; may be due to kill-ff (predation) or die-off (disease, starvation, or exposure)