Tuesday, August 16, 2011

A human female with Turner syndrome (XO) is found to be color-blind (an X-linked recessive phenotype).?

Both her mother and her father have normal vision. Explain the simultaneous origin of Turner syndrome and color blindness by the abnormal behavior of chromosomes at meiosis. Can your explanation distinguish whether the abnormal chromosome behavior occurred in the father or the mother? If so which one? Can your explanation distinguish whether the abnormal chromosome behavior occurred at the first or second division of meiosis? (why, or why not?)

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