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B-Thalassemia

B-Thalassemia. Gene disorder: Autosomal recessive Red blood cell deficiency Common ethnicities: African decent Mediterranean decent SE Asian decent Early heart & spleen disease Treatments: Blood transfusions. Odds 2 carriers produce an affected child 1/4. Assuming Dan is a carrier 1.

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B-Thalassemia

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  1. B-Thalassemia • Gene disorder: Autosomal recessive • Red blood cell deficiency • Common ethnicities: • African decent • Mediterranean decent • SE Asian decent • Early heart & spleen disease • Treatments: Blood transfusions

  2. Odds 2 carriers produce an affected child 1/4 Assuming Dan is a carrier 1 Susan Carrier 1/100

  3. Odds 2 carriers produce an affected child 1/4 Susan carrier 1/2 Dan carrier 1/8

  4. 1. Would you continue to urge Susan to have further testing to see if she has the PKU gene? 2. Should there be laws against first cousin marriages? 3. Why are most human genetic disorders the result of recessive genes? 4. Historically, members of European royalty have not been allowed to marry commoners. they have been required to marry other royals. because of this, many of the families became highly inbred. Explain why some traits that are not seen frequently in the general population have become relatively common among royalty. 5. Recently, a man and a woman planning to be married found out that they were biologically brother and sister. Both had been given up for adoption and had been raised by different families, never knowing of the other's existence. Do you think they should be allowed to be married?

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