What is the chance that the son of a man with haemophilia A will have haemophilia A? The mother is known to NOT be carrier
1.50%
2.0%
3.100%
4.5%
5.25%
EXP:
Haemophilia A is X linked. The son will inherit the fathers Y chromosome and a normal X from his mother. Technically, the risk is slightly above 0 due to spontaneous mutations.