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Home Q & A Board Biology-Related Homework Help Cell Biology
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barry barry
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Posts: 11630
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12 years ago
A woman with normal vision, whose father has sex-linked color blindness, marries a man with normal vision. They have a son who has Klinefelter syndrome and is color blind. Describe precisely what kind of event could caused have his Klinefelter syndrome.
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Staff Member
12 years ago
Nondisjunction must have occurred in the mother during meiosis II, when sister chromatids normally separate. With Klinefelter syndrome, the boy has an XXY karyotype. Since both of his X chromosomes contain the allele for color blindness, he likely has two copies of one homolog of his mother's X chromosome containing the allele for color blindness.
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