Final answer:
The phenotype for the genotype XhXh is hemophilia because hemophilia is an X-linked recessive disorder and the presence of two recessive alleles (XhXh) results in the disease. Therefore correct option is B
Step-by-step explanation:
For the genotype XhXh, where Xh denotes the allele for hemophilia, the phenotype in humans would be hemophilia. This is because hemophilia is an X-linked recessive disorder. In females (XX), both X chromosomes need to carry the hemophilia allele for the individual to express the disease.
Therefore, someone with XhXh would not be able to produce enough clotting factors, leading to the symptoms of hemophilia. Normal blood clotting requires at least one dominant allele for the clotting factor. Since neither X chromosome in this genotype has the normal clotting factor allele, individuals with XhXh cannot clot blood properly. Therefore, the correct answer is B) Hemophilia.