If a boy's father has haemophilia and his mother has one gene for haemophilia,

If a boy’s father has haemophilia and his mother has one gene for haemophilia,

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?

(a) 0%
(b) 50%
(c) 100%
(d) 75%

50%

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