hemophilia is an x-linked recessive disorder (xh) that is passed through generations and can be traced by using a pedigree.

based on the pedigree that is shown, which describes john?

a) carrier for hemophilia
b) expresses hemophilia
c) does not have hemophilia
d expresses hemophilia and died of complications

Based on the pedigree shown, John C) does not have hemophilia. In X-linked recessive disorders, females must have both recessive alleles Xh to express the trait. On the other hands, males have only one X chromosome on which will depend the expression of the trait. John's genotype is XHY. So, he has dominant allele XH and he does not have hemophilia or he is a carrier for the trait.