1 doctor weighed in:
Hemophilia a is a sex-linked recessive so that means the mothers never have it?
1 doctor weighed in

Dr. Louis Krenn
Family Medicine
In brief: Not always
Hemophilia a is a x-linked recessive gene.
It means if a male has the defective gene, because they have 1 x and 1 y, they will have hemophilia. In order for a female to get it, she would have to get 1 copy from a carrier mother and a hemophiliac father. She would then have two copies of the bad chromosome and would have hemophilia. The chances of a female getting two copies is less than a male.

In brief: Not always
Hemophilia a is a x-linked recessive gene.
It means if a male has the defective gene, because they have 1 x and 1 y, they will have hemophilia. In order for a female to get it, she would have to get 1 copy from a carrier mother and a hemophiliac father. She would then have two copies of the bad chromosome and would have hemophilia. The chances of a female getting two copies is less than a male.
Dr. Louis Krenn
Dr. Louis Krenn
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