epistasis

Question 1

what is epistasis

Answer 1

-interaction of non-linked genes where one marks or blocks the expression of the other
-genes may be antagonistic or complimentary

Question 2

what does epistasis cause

Answer 2

-reduces number of phenotypes in the F2 generation different unusual ratios

Question 3

what are the names of the two genes interacting in epistasis

Answer 3

-epistatic gene = the gene masking the effect of another gene
-hypostatic gene = gene whose functionality of the expression is marked or prevented

Question 4

what are the two types of epistasis and explain them

Answer 4

-dominant epistasis= when one or both dominant epistatic alleles are present, masking of the other gene occurs

-recessive epistasis= epistatic gene must be homozygous for it to mask the hypostatic gene

Question 5

what is the dominant epistasis ratio
what is the recessive epistasis ratio

Answer 5

12:3:1
9:3:4 and 13:3