Chapter 5

Question 1

What is dosage compensation?

Answer 1

Random x inactivation. X chromosome condenses into a barr body to reduce X linked proteins

Question 2

Multiple alleles-

Answer 2

More than 2 alleles per locus (EG blood types, can be IAIB, IAia, etc)

Question 3

Gene interaction

Answer 3

Genes at more than one loci determine phenotype

Question 4

Recessive epistasis F2 ratio

Answer 4

9:3:4 F2 ratio

Question 5

Dominant epistasis F2 ratio

Answer 5

12:3:1 F2 ratio

Question 6

Duplicate recessive epistasis F2 ratio

Answer 6

9:7 F2 ratio

Question 7

What is dominant epistasis?

Answer 7

1 dominant allele maks the effects of another one

Question 8

What happens in duplicate recessive epistasis?

Answer 8

Series of rxns where A turns into B, then dominant allele turns B into C

Question 9

What do you do to assess probability?

Answer 9

Add all terms together, keep in mind degrees of freedom=n-1

Question 10

Heterozygous females are ____ for x linked traits

Answer 10

Mosaics

Question 11

Why aren’t X females normla?

Answer 11

Barr body still goes through gene expression to an extent (some proteins still produced)