biology questions please help!!!?

1. Joe and Sue are carriers of the recessive condition albinism (each have genotype Aa). They have one child, and a second child two years later. The probability of the second child having genotype aa is ______ of the first child having genotype aa.

a. dependent

b. independent

When Mendel crossed yellow-seeded and green-seeded pea plants, all the offspring were yellow seeded. When he took these F1 yellow-seeded plants and crossed them to green-seeded plants, what genotypic ratio is expected?

a. 9:3:3:1

b. 3:1

c. 1:2:1

d. 1:1

Hemophilia is caused by several genetic factors; one, a recessive allele of an X-linked gene, is the subject of this problem. Assume that a man with hemophilia marries a normal woman whose father had hemophilia. What is the probability that they will have a daughter with hemophilia?

a. 1/2

b. 1/4

c. 1/16

d. 1/8

e. 3/4