Pedigree

Question 1

Autosomal dominant

Answer 1

Dont skip generations
Affected parents can have unaffected children
Unaffected parents cannot have affected children

AA - Affected
Aa - Affected
aa - Normal

Frequency between sexes are the same

Question 2

Autosomal recessive

Answer 2

Skips generations
Normal parents can have affected children

AA - Normal
Aa - Carrier
aa - Affected

Frequency is equal between sexes

Question 3

X-linked dominant

Answer 3

Never from father to son!
Trait is common in pedigree

Affected fathers pass to ALL their dauhters

Frequency is equal between sexes

Question 4

X-linked recessive

Answer 4

Never from father to son!
Skips generations
Trait is rare in pedigree

Tends to travel from mother –> son

Tends to travel from father –> daughter