The failure of chromosomes to separate during cell division is known as:
A
aneuploidy
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B
ploidy
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C
nondisjunction
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D
crossing over
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Solution
The correct option is C
nondisjunction
Sometimes either homologous chromosomes or sister chromatids fail to separate properly during meiosis. This is called nondisjunction, and it produces gametes with an abnormal number of chromosomes.