Hemophilia is an X-linked recessive trait in humans. If phenotypically normal parents have children without hemophilia, pedigree analysis
A) could demonstrate that neither parent carries the hemophiliac allele.
B) would show that none of their children is a carrier of the hemophilia allele.
C) would show that none of their children could have hemophiliac children.
D) would not be able to show the exact genotypes of the parents or children.

Question

Quizplus · Accepted Answer

Pedigree analysis alone cannot definitively determine the exact genotypes of phenotypically normal parents or their children for an X-linked recessive trait like hemophilia, especially if no affected individuals are present.

Hemophilia Is an X-Linked Recessive Trait in Humans