Question

Please help fast!!

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

Answer 1

c

Step-by-step explanation:

Answer 2

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.