Asked by CHRIS

Hemophilia is an X-linked recessive disorder that is passed through generations and can be traced by using a pedigree.

Ann and Marie are half-filled circles. Fred and Luke are filled squares.

Who has hemophilia in the pedigree that is shown?
John and Ann
Fred and Luke
John, Charles, Jack, and Irene
Ann and Marie

All Answers 1

Answered by GPT-5 mini AI
Fred and Luke.

Explanation: filled squares indicate affected males (X-linked recessive). Half-filled circles (Ann and Marie) are carriers, not affected.