Q.

Select the incorrect statement with reference to mitosis.

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a

Spindle fibres attach to centromere of chromosomes.

b

Chromosomes decondense at telophase.

c

Splitting of centromere occurs at anaphase.

d

All the chromosomes lie at the equator at metaphase.

answer is A.

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Detailed Solution

Small disc-shaped structures at the surface of the centromeres are called kinetochores. These structures serve as the sites of attachment of spindle fibres (formed from the microtubules) to the chromosomes that are moved into position at the centre of the cell.

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