Topic 2 Independent Assortment

Question 1

Probability of A/A x a/a

Answer 1

All A/a genotype, all A phenotype

Question 2

Probability of A/A x A/a

Answer 2

1:1 A/A and A/a, all A phenotypes

Question 3

Probability of A/a x a/a

Answer 3

1:1 A/a and a/a, 1:1 A and a phenotypes

Question 4

Probability of A/a x A/a

Answer 4

1 A/A : 2 A/a : 1 a/a

3 A : 1 a phenotypes

Question 5

What are recombinant gametes

Answer 5

The gametes that don’t reflect same phenotype as any of the parental (P0) phenotypes

Question 6

What is a dihybrid cross

Answer 6

Crossing individuals that differ in two traits
Ex, seed shape and colour
Round yellow x wrinkled green

Question 7

Equation for solving for n number of progeny to get desired genotype

How do we round n

Answer 7

1-(p failure)^n=0.95

Always round n up

Question 8

What are the degrees of freedom for a mono hybrid cross, for a dihybrid cross

Answer 8

Mono: 2 phenotypes-1= 1
Di: 4 phenotypes-1= 3

Question 9

In chi square test if p>0.05…
If p<0.05

Answer 9

Accept null hypothesis (greater than 5% chance results are consistent)
Reject null

Question 10

What is the expect phenotypic ratio of a dihybrid cross

Answer 10

9 A/-;B/- dom dom
3 A/-;b/b dom rec
3 a/a; B/- rec dom
1 a/a; b/b rec rec

Question 11

What is the expected genotypic ratio of a mono hybrid cross

Answer 11

1 G/G
2 G/g
1 g/g

Question 12

How do you find probability of faliure

Answer 12

See the probability of getting the genotype you want. Then subtract by 1

Genotype: 1/16

P faliure 15/16

Question 13

In a dihybrid cross with a tester, what is the ratio of parental to recombinant is genes are unlinked

Answer 13

1:1:1:1