Inheritance

Option List:
A. 1 in 2
B. 1 in 12
C. 1 in 3
D. 1 in 4
E. 1 in 8
F. 2 in 3
G. 2 in 7
H. 3 in 4
I. 100%
J. 0%
A woman has a brother affected by haemophilia A and comes to see you to discuss the implications of this as she is planning a pregnancy. Which of the answers from the list is the most appropriate?
All the options can be chosen once or More than once

1. What is the chance of her having an unaffected son?

2. What is the chance of her having a daughter who is a carrier?

3. What is the chance of her being a carrier?

4. What is the chance of her brother having an affected son?

5. What is the chance of her having a son who is a carrier?