What children will appear in a marriage between a woman carrying the hemophilia gene and a hemophiliac father?

The hemophilia gene is recessive and linked to the X chromosome. This means that this gene is absent in the man’s Y chromosome.

Let A – normal blood clotting, then a – hemophilia. If a woman is a carrier of a gene, then her genotype is ХАХа. And a man suffers from hemophilia, which means he has a genotype – ХаУ.

РР (f) ХАХа (н) х (m) ХаУ (г)

(f)/(m) Ха У ХА ХАХа(н) ХАУ(н) Ха ХаХа(г) ХаУ(г)

In this family, the probability of having children with hemophilia is 50%, while this disease can be in both boys and girls.



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