Pedigrees

Question 1

Pedigree

Answer 1

A way of tracking inheritance of a particular trait and determining genotypes of a individual

Question 2

Shaded

Answer 2

The expressed trait

Question 3

Genders

Answer 3

Females are circle, males are square

Question 4

Autosomal dominant

Answer 4

the shaded people have the dominant trait (EE or Ee)

Question 5

Autosome

Answer 5

chromosome pair 1 -22, the pedigrees can be either Autosomal recessive or Autosomal dominant

Question 6

Sex chromosome

Answer 6

If the gene is found on pair 23 (the sex chromosome) the trait can be either: X-linked dominant or X linked recessive.

Question 7

Autosomal recessive

Answer 7

the shaded people have the recessive trait (ee), the trait often skips generations

Question 8

X linked traits

Answer 8

if the gene is on a sex chromosomes

Females can have the genotypes: XᴱXᴱ, XᴱXᵉ for dominant, XᵉXᵉ for recessive
Males can have the genotypes: XᴱY for dominant, XᵉY for recessive

Men only have one copy of the gene while women have 2 (X)

Question 9

X linked dominant

Answer 9

Females: XᴱXᴱ or XᴱXᵉ
Males: XᴱY

The affected son must have a affected mother.
Affected males will pass the trait to all their daughters
Both sexes are affected, but typically seen more in females

Question 10

X linked recessive

Answer 10

Females: XᵉXᵉ
Males: XᵉY

Affected mothers will pass on the trait to all their sons (remember: boys get X from their mother and Y from father)
The trait often skips a generation
Both sexes are affected , but seen in males more frequently