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Determining Genetic Risk   :  Case 3 - Hemophilia A

Determining Genetic Risk

Case 3 - Hemophilia A


Family history:

Mr. and Mrs. Smith have a 30 year-old son with Hemophilia A. They also have one unaffected daughter. Upon further questioning you realize that there is an extensive family of Hemophilia A. .

  • Their son has two daughters and one son. None of his children are affected. However, one of his daughters has an affected son and two unaffected daughters.
  • Their daughter has an affected son, and two unaffected daughters. One of the daughters has two affected sons.