If nondisjunction occurs and an individual survives, which disorder can occur?

Nondisjunction is the failure of chromosomes to separate properly during cell division, creating cells with an extra or missing chromosome. If the individual survives, a sex-chromosome number disorder such as Klinefelter syndrome (typically XXY) can result. Robertsonian translocation, DiGeorge syndrome, and fragile X syndrome are caused by other chromosome changes or mutations.

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