During cell division, sometimes there will be failure of separation of sister chromatids. This event is called as

Interference

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Complementation

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Coincidence

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Non-disjunction

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Solution

The correct option is D Non-disjunction
The failure of separation of sister chromatids is called non-disjunction of chromosomes. It will lead to both the sister chromatids migrating towards one pole only. Consequently, the other pole will not receive any chromosome and unbalanced progeny cells will be produced.
So, the correct answer is option D.

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