In humans, hemophilia is caused by an X-linked recessive gene. A woman who is a nonbleeder - that is, she does not display the blood-clotting irregularities associated with hemophilia - had a father who was a hemophiliac.

She marries a nonbleeder, and they plan to have children.

Calculate the probability of hemophilia in the female and male offspring.

Question

Biology

Chaim Vega

1 December, 09:18

In humans, hemophilia is caused by an X-linked recessive gene. A woman who is a nonbleeder - that is, she does not display the blood-clotting irregularities associated with hemophilia - had a father who was a hemophiliac.

She marries a nonbleeder, and they plan to have children.

Calculate the probability of hemophilia in the female and male offspring.

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Answers (1)

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Baldie · Answer 1

one normal girl

One normal boy

One carrier girl

One colour blind boy

Explanation:

Haemophilia is a sex linked feature as it is transmitted with the chromosomes determining sex.

In humans, the male has XY and the female has XX. the Y chromosome is usually genetically empty. so as mall received his Y chromosomes from his father, he cannot inherit his father's sex linked traits. but women can as they receive and X chromosomes from their fathers. so a cross between a carrier woman Cc and a normal man C result in;

XX--CC

XX--Cc

XY--C

XY--c