Question

Hemophilia is caused by several genetic factors; a recessive allele of an x-linked gene is the subject of this quiz question. assume that a man with hemophilia marries a normal woman whose father had hemophilia. what is the probability that their daughter will have hemophilia? options: a) 1/8 b) 1/16 c) 1/2 d) 3/4 e) 1/4

Answer 1

The probability that the daughter will have hemophilia is 1/2 or 50%, as hemophilia is a sex-linked recessive disorder and the daughter has a 50% chance of inheriting the affected X chromosome from her hemophiliac father and being a carrier from her mother.

Step-by-step explanation:

The question is about the inheritance of hemophilia, a genetic disorder affecting blood clotting, which is linked to the X chromosome. Hemophilia is a sex-linked recessive trait, which means that in females, two copies of the mutated gene (one from each parent) are needed for the disorder to manifest. Since the father in the scenario has hemophilia (an affected X chromosome) and the mother is normal but her father had hemophilia (meaning she is likely a carrier with one normal X and one mutated X), there is a 50% chance that their daughter will inherit the normal X from her mother and the affected X from her father, thus having hemophilia.

The correct answer to the quiz question is c) 1/2, as the daughter has a 50% probability of having hemophilia.

Learn more about hemophilia inheritance