PS3+F09 - Bio D137 Human and Eukaryotic Genetics J L Marsh...

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Bio D137 Human and Eukaryotic Genetics Problem Set #3 J. L. Marsh Fall 2009 Due 10/13/09 1 1. Green-shifted colorblindness is sex-linked recessive. A green-shifted colorblind woman and a man with normal vision have a colorblind son with Klinefelter's syndrome. (a) Does the son's vision phenotype tell us whether nondisjunction occurred in the father or in the mother? Diagram two different cases of meiosis in the egg and sperm and the union of the necessary gametes that could produce a colorblind Klinefelter's from this union. Be sure to label the appropriate chromosomes with the alleles for color vision. (b) Repeat the above meiotic diagrams for the couple's next child who is a colorblind daughter with Turner syndrome. 2. Lobster claw syndrome, is a rare congenital deformity of the hand where the middle digit is missing, and the hand is cleft where the metacarpal of the finger should be. This split gives the hands the appearance of lobster claws. This is an autosomal dominant disorder. Bree Walker, the news anchor had this disorder. The Vadoma tribe, living in the west of Zimbabwe on the Zambezi river valley, is somewhat
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