Linkages + Epsistais

Question 1

What is sex linkage?

Answer 1

-phenotypic expression of an allele that is dependent on the gender of the individual
-located on sex chromosome

Question 2

What is autosomal linkage?

Answer 2

-2 genes located on the same chromosome

Question 3

What is epistasis?

Answer 3

-gene at 1 locus alters the phenotypic expression of a gene at 2 locus
-can mask or suppress expression of another locus

Question 4

What is recessive epistasis?

Answer 4

-presence of a recessive allele prevents the expression of another allele at 2 locus
-9:3:4 ratio

Question 5

What is dominant epistasis?

Answer 5

-dominate allele of 1 genes masks the effects of either allele of 2 gene
-gives 12:3:1 ratio

Question 6

What are the differences + similarities between epistasis and linked genes?

Answer 6

-both lead to unexpected phenotypical ratios
-linked are inherited together
-epistasis can result in 1 gene effectively silencing another

Question 7

How are sex chromosomes different from autosomes?

Answer 7

Non-homologous