Question

Hemophilia is a sex-linked genetic disorder that inhibits the blood’s ability to clot properly. Is the gene that causes hemophilia recessive or dominant?

Answer 1

It’s recessive. The mother who is a carrier is heterozygous, but she does not have the disease. The only offspring who have the disease are the boys who inherited one mutated gene.

Step-by-step explanation:

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Answer 2

The gene that causes haemophilia is recessive.