Introduction And Population Structure

Question 1

Bottleneck effect of the great prairie chicken in Illinois resulted in the area size they covered to be greatly reduced, what caused this?

Answer 1

Loss of genetic variation, inbreeding

Question 2

Founder effect is a form of?

Answer 2

Genetic drift

Question 3

Founder effect can make new, smaller populations _______ genetically from large ancestral populations- carrying _______ allele frequencies due to _______ ________

Answer 3

Different, unusual, sampling error

Question 4

What form of genetic drift may be very important for speciation?

Answer 4

Founder effect

Question 5

Genetic drift is ________ on small populations

Answer 5

Stronger

Question 6

More remote islands have more _______ species

Answer 6

Endemic

Question 7

Species that have patchy population structure but a lot of genetic drift (will/will not) differentiate?

Answer 7

Will not

Question 8

Gene flow could also be called _____

Answer 8

Migration

Question 9

______ ________ is the movement of individuals or gametes between populations

Answer 9

Gene flow

Question 10

Animal vectors and pine pollen clouds are examples of:

Answer 10

Gene flow

Question 11

______ _______ keeps populations from differing genetically, therefore it counteracts the effects of ______ ______

Answer 11

Gene flow, genetic drift

Question 12

Gene flow can work synergistically or antagonistically with:

Answer 12

Natural selection

Question 13

True/false: gene flow can both speed up or slow down adaptive changes in a population

Answer 13

True

Question 14

If there were four local areas and one was being sprayed with insecticide, what process could keep this area from adapting and how?

Answer 14

Gene flow, keep reintroducing the susceptible allele

Question 15

If there were four local areas all being sprayed by pesticide, but only some of the populations had the allele for resistance, how could they all adapt to become resistant?

Answer 15

Gene flow

Question 16

What are the characteristics of a non evolving population?

Answer 16

• no net mutations
• large (infinite) population
• mating is random
• population is isolated
• no natural selection

Question 17

What does the hardy-weinberg equilibrium describe?

Answer 17

A non evolving population

Question 18

True or false: in a non evolving population, allele and genotype frequencies remain constant between generations DESPITE the reshuffling of genes during meiosis

Answer 18

True

Question 19

Each egg and each sperm has an 80% chance of having the Cr allele and a 20% chance of having the Cw allele, what is the probability that an egg and sperm will produce a homozygous recessive offspring?

Answer 19

4% (multiply .2 x .2)