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What causes disorders such as Klinefelter's syndrome and Turner syndrome?

Answer:

non disjunction of sex chromosomes

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How is Klinefelter's syndrome different from Turner's syndrome?
Klinefelter = XXY Turner's = X Klinefelter syndrome is the extra X and can lead to somewhat of a female secondary sexual characteristic in men. Turner's is the single X some women receive and can...
What is trisomy-21 klinefelter syndrome and turner syndrome?
All 3 conditions occur when non disjunction occurs in meiosis of the parent when they are producing gametes (egg or sperm). In normal meiosis, each parent gamete has 1 copy of each of the 22 somatic...
Is klinefelter syndrome a chromosome disorder?
Yes
What causes Klinefelter syndrome?
It could be a problem very early in development (during pregnancy). About 1/3 of all males with Klinefelter syndrome have other chromosome changes involving an extra X chromosome. This syndrome isn't...