Lecture 22C

Question 1

what does population genetics focus on

Answer 1

allele and genotype frequencies and how they change overtime

Question 2

how do we keep track of evolution?

Answer 2

Allele frequency(phenotype)

Question 3

what are the 5 evolutionary processes

Answer 3

genetic flow
genetic drift
natural selection
mutation
sexual selection

Question 4

HWE

Answer 4

stable allele frequency

Question 5

hwe explains

Answer 5

The gene pool remains stable, and there are no new mutations introducing new alleles

Question 6

hwe conditions

Answer 6

no mutation
Random mating (no sexual selection or inbreeding)
No natural selection
No gene flow
no genetic drift
Large population size

Question 7

when considering w single cross, )/3 gametes produced by

Answer 7

parents

Question 8

when considering a population use gametes produced by

Answer 8

all members of population

Question 9

p and q are the frequencies of the

Answer 9

A and a alleles of the population

Question 10

who was the hwe derived by

Answer 10

george hardy and wilhelm weinberg

Question 11

what year did hwe come about

Answer 11

1908

Question 12

The hardy Weinberg principle states that, after one generation of random mating, genotype frequencies for two alleles at one gene will be

Answer 12

p^2, 2pq, and q^2

Question 13

what does q equal in hwe

Answer 13

frequency

Question 14

p^2 is

Answer 14

frequency

Question 15

2pq is

Answer 15

heterozygous genotype

Question 16

q^2 is

Answer 16

homozygous recessive genotype

Question 17

p^2+2pq+q^2=?

Answer 17

1

Question 18

where does the 2 come from in 2pq

Answer 18

there are 2 ways to make the heterozygous genotype

Question 19

what frequencies remain constant in succeeding generations if specific conditions are met

Answer 19

allele and genotype

Question 20

a gene in hwe

Answer 20

is not evolving

Question 21

instead of A and a in Hwe we use

Answer 21

A1 and A2

Question 22

Consider a population with a frequency of allele A1 = 0.2
and allele A2 = 0.8. If this population is in Hardy-Weinberg equilibrium (HWE), what is the EXPECTED frequency of each genotype (A1A1, A1A2, and A2A2)

Answer 22

A1A1:(.2)^2= .04

A1A2=2(.2)(.8)=2(.16)= .32

A2A2= (.8)^2 =.64

Question 23

The Amish population of Pennsylvania has a high incidence of polydactyly (extra fingers or toes). This is caused by a single dominant allele. In one population, 36 percent of children are born with polydactyly.
Assuming Hardy-Weinberg Equilibrium, the frequency of the dominant allele in the population is

Answer 23

100-36= 64

sqrt64= .8

p=1-q

1-.8=(.2)!!!

Question 24

HW focuses on one

Answer 24

gene at w time