The hemophilia gene is an X-linked recessive gene. This means that a person will be hemophiliac if has two copies of the recessive "h" allele (in the case of females) or if has one copy (in the case of males). This also means that if the individual possesses the dominant H allele, he or she will not have hemophilia. Therefore, when performing the punnet table of section 2, we can observe that only one of four descendants would present hemophilia and in this case, it would be a male with genotype X^h Y (25% male), and only one of four would be a carrier that doesn't present hemophilia and in this case, it would be a woman with genotype X^H X^h (25% female)
