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

Nondisjunction happens when chromosomes fail to separate properly during cell division, producing an abnormal number of chromosomes. A surviving individual with an extra X chromosome and a Y chromosome can have Klinefelter syndrome (47,XXY). Fragile X and DiGeorge syndromes result from other genetic changes, while a Robertsonian translocation is a chromosome rearrangement.

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