Help me please

Question

a hemophillic male child is born from a normal husband.from all his children how many percent of this paretns have normal male children?

 

a.12.5

b.25.00

c.37.50

d.50.00

e:75.00

 

Answer 1

Hello Alexander,

 

Since the hemophilia gene is carried on the X chromosome, the trait cannot be inherited from the "normal" father. It is a trait that the male child can only inherit from the mother. If the mother happens to be hemophilic, then 100% of her male offspring will be hemophilic. If she is only a carrier of the trait, then there is a 50% chance for her male offspring will be hemophilic.

 

Hope that helps!