Question

who has hemophilia in the pedigree that is shown?
john and ann
fred and luke
john, charles, jack, and irene
ann and marie

Explanation:

In the pedigree, individuals with hemophilia are represented by the genotype \(X^{h}Y\) (males) as hemophilia is an X - linked recessive disorder. Looking at the pedigree, Fred (\(X^{h}Y\)) and Luke (\(X^{h}Y\)) have the hemophilia - associated genotype.

Answer:

Fred and Luke