Chapter 4

Question 1

What mode of inheritance is this?

Answer 1

Autosomal recessive

If there is equal number girls and boys affected, and unaffected parents are still able to produce affected offspring

Question 2

If there are more males affected than females, what inheritance pattern is it?

Answer 2

X-linked recessive

Question 3

What mode of inheritance is this?

Answer 3

Mitochondrial aka MATERNAL!

If only mom is able to pass it to all her kids

Question 4

If there are more females affected than males, what inheritance pattern is it?

Answer 4

X linked dominant

Question 5

Penetrance

Answer 5

The probability that a disease phenotype will be present when the disease genotype is present

Question 6

Expressivity

Answer 6

The potentially variable degree of phenotypic expression of a trait. NOT THE SAME AS CODOMINANCE!

(A hairless cat and hairy cat all have kittens with different amounts of fur)

Question 7

Penetrance vs Expressivity

Answer 7

Penetrance gives the quantity of how often a person with the genotype actually show the phenotype (ex. 61% of people have penetrance for oddly shaped ears)

Expressivity gives the qualities of the variation or severity of the phenotype (ex. 61% have oddly shaped ears but some have big ears, some have small ears, some have lopsided ears, etc.)