Use the pedigree on the right to determine which of the following are possible genotypes for irene. xhy xhxh xhy xhxh

XHXH

Explanation:

To solve this we will make a Punnett square

Y                                

So we can conclude from above that, girls can only have

as XX means girl and XY means boy but since it is not half shaded it means that the genotype is homogeneous.

Furthermore, the females are not affected unless both the

X chromosomes have the affected allele.

Irene is neither a carrier nor affected. This means that she carries normal alleles on both X chromosomes. Hence, her allele combination is X^{H} X^{H}.                    

your spelling is a little off : ]