Pedigrees

Question 1

Autosomal dominant

Answer 1

Affected individuals always have affected parents

Question 2

Autosomal recessive

Answer 2

Unaffected parents can have affected offspring (trait can skip a gen)

Question 3

X-linked recessive

Answer 3

Males are affected more frequently than females

Question 4

Difficulties with human genetics

Answer 4

• can noted perform controlled crosses
• small #of offspring
• long gestation time and long generation time
• no true-breeding strands
• environmental factors