Question

Hemophilia is an X-linked recessive disorder that is passed through generations and can be traced by using a pedigree. In the pedigree that is shown, which represents Irene's allele combination?
XhXh


XHXh


XHXH


XhY

Answer 1

The correct answer is XHXH.

Hemophilia is an inherited genetic disease, which damages the tendency of the body to produce blood clots, that is, a procedure required to inhibit bleeding. Hemophilia A and B are both X-linked recessive disorders, though the females are hardly influenced.

X-linked recessive inheritance refers to a kind of inheritance in which a mutation in a gene on the X-chromosome makes the phenotype to be articulated in males hemizygous for the mutation of the gene, as they exhibit one X and one Y chromosome.

Answer 2

the answer to the question is  XHXH.