Lecture 20: Population Structure

Question 1

Population

Answer 1

The number of individuals of the same species in a given area

Question 2

Migration

Answer 2

The movement of individuals from one population to another

Question 3

Gene flow

Answer 3

The movement of genes from one area to another

Question 4

Stochastic

Answer 4

unpredictable evolutionary forces such as mutation, recombination, or genetic drift

Question 5

Deterministic

Answer 5

Natural selection

Question 6

Genetic drift

Answer 6

stochastic changes in allele frequency due to fecundity and mortality

Question 7

population bottlenecks

Answer 7

a single sharp decline usually followed by a rebound

Question 8

founder events

Answer 8

colonization by a few individuals that start a new population

Question 9

what may explain phenotypic differentiation?

Answer 9

adaptation
genetic drift
phenotypic plasticity

Question 10

phenotypic plasticity

Answer 10

ability of a genotype to modify its phenotype in response to the environment

Question 11

What kinds of experiments study adaptations

Answer 11

reciprocal transplant which is when you grow equivalent genotypes in different environments

Question 12

local adaptation in humans

Answer 12

lactose tolerance
disease prevention(malaria)
skin pigmentation