Which of the following phenomenon is depicted in the given diagram?

Linkage

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Independent assortment

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Crossing over

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Nondisjunction

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Mutation

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Solution

The correct option is E Nondisjunction
From the observation of the above given diagram, the sister chromatids are not separated which results in the abnormal distribution of the chromosomes in the daughter nuclei (as can be seen in the gametes). This phenomenon is called non-disjunction.
So, the correct answer is option D.

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