Quest 3 Case Studies

Question 1

stable equilibrium

Answer 1

if displaced by a small amount the system will return to equilibria

Question 2

neutral equilibrium

Answer 2

if displaced, the system will remain in the displaced position

Question 3

unstable equilibrium

Answer 3

if displaced by a small amount the system will move even further from its initial position

Question 4

pocket mouse selection coefficient

Answer 4

frequency independent selection

Question 5

sickle cell and malaria

Answer 5

overdominance. in heterozygote form sickle cell does not cause pathology and protects against malaria. heterozygote advantage in areas where malaria is prevalent

Question 6

immune function in mice

Answer 6

underdominance. heterozygotes suffer most. homozygote for NZB has some negatives and NZW is normal

Question 7

sunflowers

Answer 7

fecundity selection: hybrid flowers had significantly less seed production, Selection on fecundity rapidly eliminated sunflowers from wild populations

Question 8

mutation selection balance

Answer 8

FAP disease, cystic fibrosis

Question 9

wolves inbreeding

Answer 9

As inbreeding coefficient increases, the number of surviving pups decreases

Question 10

transmission to population genetics

Answer 10

transmission is genotypes of individuals compared to their parents and population is genotype of offspring in pop compared to the parental pop

Question 11

elder flowers

Answer 11

frequency dependent selection, if more purple flowers than yellow, yellow will be pollinated more bc purple has to compete

Question 12

Kuru

Answer 12

degenerative neurological disease of infectious proteins

Question 13

drosophila maggots

Answer 13

2 polymorphisms, negative frequency dependent selection