Question

Why does the son of carrier mother and a normal father suffer from haemophilia whereas the son of haemopillic father and normal mother would not ?​

Answer 1

Here's your answer....

Son of a carrier female and normal male will definitely suffer from hemophilia as he will inherit an affected gene (X) from his mother and a normal gene(Y) from his father. As male show heterogamy, the affected gene(X) will be dominant as there isn't another normal(X) to neutralize its effect.

And in the case of hemophilic father and normal mother....

He will inherit a normal gene (Y) from his father { affected gene in case of hemophilia is always (X) } and normal (X) from his mother.

Hence he is unaffected/ normal.

Hope it helps you out.....

Answer 2

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Son of a carrier female and normal male will definitely suffer from hemophilia as he will inherit an affected gene (X) from his mother and a normal gene(Y) from his father. As male show heterogamy, the affected gene(X) will be dominant as there isn't another normal(X) to neutralize its effect.

$\huge\underbrace\bold\red{❧@ItZTanisha❆}$