If a boy's father has haemophilia and mother is heterozygous, what is the chance that the boys will inherit haemophilia.

Q. If a boy's father has haemophilia and his mother has one gene for haemophilia, what is the chance that the boy will inherit the disease ?

Q. A normal woman, whose father had haemophilia, married normal man. What is the chance of occurrence of haemophilia in their children ?

Q. Mary's father has haemophilia but her husband is also haemophlic. What is the chance of her daughter having this disease ?

Q. If father is normal while mother is carrier of haemophilia.

Q. The following pedigree chart shows the inheritance of haemophilia in a family.

(a) What would be the possible genotype of members 4 and 5?
(b) A blood test shows that member 14 has haemophilia gene. What would be the probability that her child will be a haemophilic boy? [3]