(4-3) Inheritance of Sex Linked Traits and Pedigree Analysis

Question 1

From true breeding parents… Males pass on the recessive trait only to their:

Answer 1

Grandsons

Question 2

From true breeding parents… Females pass on the recessive trait only to their:

Answer 2

Sons

Question 3

• all daughters of fathers are carriers
• females pass to sons, males pass to grandsons
• more males

Answer 3

X-Linked Recessive

Question 4

• does not skip generations
• more females

Answer 4

X-Linked Dominant

Question 5

• only males affected
• passed from father to all sons

Answer 5

Y-Linked Trait

Question 6

• tends to skip generations
• when both parents are heterozygous approximately 1/4 offspring affected
• appears in both sexes on equal frequency

Answer 6

autosomal recessive

Question 7

• usually appears in both sexes with equal frequency
• does not skip generations
• both sexes transmit trait to their offspring

Answer 7

autosomal dominant

Question 8

• inherited from mother only
• all children of affected mothers

Answer 8

Maternal Inheritance