Hemophilia is a sex-linked disorder. Males who receive the allele are always affected. Females are affected only 25% of the time. Which kind of inheritance must hemophilia display and why?(1 point) Responses Y-linked recessive because the males that receive the allele sometimes have hemophilia. Y-linked recessive because the males that receive the allele sometimes have hemophilia. Y-linked dominant because all males with the allele have hemophilia. Y-linked dominant because all males with the allele have hemophilia. X-linked recessive because all males with the allele have hemophilia, and only some females if they receive two recessive alleles. X-linked recessive because all males with the allele have hemophilia, and only some females if they receive two recessive alleles. X-linked dominant because everyone with the allele has hemophilia.

Answer 1

The correct response is: X-linked recessive because all males with the allele have hemophilia, and only some females if they receive two recessive alleles.

Explanation:

Hemophilia is located on the X chromosome, and because males have only one X chromosome (XY), they will express the trait if they inherit the X chromosome carrying the hemophilia allele. Females, on the other hand, have two X chromosomes (XX), and they would need to inherit two copies of the recessive allele (one from each parent) to express the trait. This results in the 25% chance of females being affected if one parent is a carrier (X^h) and the other is unaffected (X). Hence, the inheritance pattern is characteristic of X-linked recessive inheritance.