8.3 Inheritance

Question 1

What are all the modes of inheritance?

Answer 1

Autosomal Recessive
Autosomal Dominant
Y-Linked
Sex-Linked Recessive
Sex-Linked Dominant

Question 2

What is a sign that a trait is recessive in a pedigree?

Answer 2

Unaffected parents with an affected child

Question 3

What is a sign that a trait is Y-Linked?

Answer 3

A high ratio of affected males to females.

Question 4

If the trait is dominant, then at least _ of the parents have to be affected.

Answer 4

1

Question 5

How do you see an X Linked sex trait in a pedigree?

Answer 5

Males are often the greater in the ratio of affected to unaffected because they get the X trait and do not have to have both Xs to have the trait, because of the Y