Question

A woman who is a carrier for hemophilia marries a hemophiliac man. What will be their children’s possible phenotypes?

Answer 1

Answer:

Hemophilia is a sex-linked recessive disorder in which a person's blood do not clots and he can bleed to death even after minor injuries because blood will keep running due to a small cut.

It is a recessive trait which means that even if one normal gene is present along with Hemophiliac gene, the person will not have the disease and he will be the carrier.

Question: What will be their children’s possible phenotypes?

If a woman who is a carrier for hemophilia marries a hemophiliac man, their genotypes can be denotes as :

Here H, indicate normal gene and small h indicate defected (hemophilia) gene.

Parents:                      XHXh                   X           XhY

Offspring:                   XHXh : XHY:  XhXh:  XhY

Phenotype of offspring:

XHXh:  The child will be daughter and normal (25 % chances)

XHY:     The child will be son and normal (25 % chances)

XhXh:   The child will be girl and Hemophiliac (25 % chances)

XhY:      The child will be son and Hemophiliac (25 % chances)

Hope it helps!