During cell division, spindle fibers attach to which part of chromosomes?

Primary constriction

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Secondary constriction

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Chromomere

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Chromatid

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Solution

The correct option is A Primary constriction
During cell division, spindle fibers attach to primary constriction of the chromosomes. Spindle fibres are mainly composed of microtubules which contract and relax to align the chromosomes at a particular orientation.
So, the correct answer is option A.

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