Hemophilia Is an X-Linked Recessive Trait in Humans

question 28

Multiple Choice

Hemophilia is an X-linked recessive trait in humans. If phenotypically normal parents have children without hemophilia, what information could be determined by a pedigree analysis?

• A) Neither parent carries the hemophiliac allele.
• B) None of their children is a carrier of the hemophilia allele.
• C) None of their children could have hemophiliac children.
• D) The exact genotypes of the parents or children

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