What is the probability that the children of parents X^X and X^Y will have hemophilia?

To determine the probability of the children having hemophilia from parents with genotypes X^X (a normal female) and X^Y (a male with hemophilia), we can use a simple Punnett square.

1. Parent Genotypes:

– Mother: X^X (normal)

– Father: X^Y (hemophiliac)

2. Possible gametes:

– Mother can contribute: X (normal)

– Father can contribute: X (normal) or Y (hemophiliac)

3. Punnett Square:

– X (from mother) | X (from father) → X^X (normal female)

– X (from mother) | Y (from father) → X^Y (normal male)

From this, the potential offspring will either be X^X (normal female) or X^Y (normal male).

No child can inherit hemophilia since the father contributes the Y chromosome only, and the mother only has normal X chromosomes. Therefore, none (0%) of the children will have hemophilia.

However, since this is a multiple-choice question, the closest answer would suggest that 0% is not an option given. Given the options provided, the answer would be:

0%, but since that isn’t listed, from the given choices, it appears there may be a misunderstanding in the question.

Please check the details, as the answer logically derived from the genetic progression indicates a