Chpt 25: (10) Random Evolutionary Events

Question 1

Founder EVENT

Answer 1

when a subset of a population breaks off from the original

Question 2

Genetic polymorphism

Answer 2

when there are multiple different alleles for a gene (not must 2)

Question 3

Bottleneck effect

Answer 3

what happens when a large population is is dramatically reduced, then the survivors start reproducing again with limited genetic variation

Question 4

What the impact of genetic drift is based on

Answer 4

size of population

small populations have fewer individuals to dilute the impact of the drift event (that’s why Hardy Wienberg require infinite population)

Question 5

Heterozygosity (H) formula

Answer 5

H = 1 - (p^2 + q^2)

basically H = 2pq

Question 6

Ecological corridor

Answer 6

a physical connection between spaces like reserves/protected areas that are used to reduce genetic isolation/promote gene flow and diversity

Question 7

Heterozygosity (H) definition

Answer 7

probability of drawing 2 different alleles from a gene pool

probability of having heterozygote

also called gene diversity

Question 8

fragmentation

Answer 8

when a previously large continuous habitat is broken into smaller, unconnected pieces

exp. from class: cape buffalo

Question 9

Founder EFFECT

Answer 9

what happens if population subset (formed by a founder event) starts reproducing with its limited genetic diversity