Question

Hemophilia is an X-linked blood clotting disorder. If 25% of women in a population are afflicted, how many men are carriers?

- 0%

-100%

-75%

-25%

-50%

Answer 1

Hemophilia (also known as classic hemophilia or factor VIII deficiency) is a bleeding disorder in which blood does not clot normally. It is an inherited x-linked recessive pattern. If 25% of woemn in a population are affected, then 50% of the men will be carriers. X-linked traits are maternally inherited from carrier mothers or from an affected father. Each son born to a carrier mother has a 50% probability of inheriting the X-chromosome carrying the mutant allele.