Hemophilia is an X-linked recessive disorder (Xh) that is passed through generations and can be traced by using a pedigree. Based on the pedigree that is shown, which describes John? A. carrier for hemophilia B. expresses hemophilia C. does not have hemophilia D. expresses hemophilia and died of complications

QUESTION POSTED AT 29/05/2020 - 01:10 AM

Answered by admin AT 29/05/2020 - 01:10 AM


The correct answer is C. does not have hemophilia


In the given pedigree John has an XH chromosome, which means that he has the dominant chromosome. As males have one X, they can either be affected or unaffected. So, in this case John could not be carrier. Also, the Dominant chromosome is fully functional and does not show the characters of the disease, so, John would be free of hemophilia.

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