Question

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

C) Does not have hemophilia

Step-by-step explanation:

When a pedigree is half shaded, the person is a carrier.

When a pedigree is not shaded, the person doesn't express the gene.

When a pedigree is completely shaded, the person is affected.

Square usually is male and circles are usually female.

Since John is the non-shaded square and parent of 4 offspring, he does not have hemophilia. However, his wife is a carrier, and that's how their offspring have hemophilia.