Question

Arrange the following events in the order in which they occurred.

Answer 1

Answer:

1→4→5→3→2

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Mitotic cell division starts with the condensing of chromosome accompanied by splitting of the centrosome and its movement towards the opposite poles.

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As the nuclear envelope and nucleolus disappear, spindle fibres arise from the centrosomes and start binding to the condensed chromosomes at the centromeres.

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The chromosomes bound by the spindle fibers are then arranged in the middle of the cell forming the equatorial metaphase plate.

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Next the centromere splits and the sister chromatids are pulled away towards the poles by the contraction of spindle fibres.

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Following this, a cleavage furrow starts to develop in the middle of the cell while the nuclear membrane starts to reappear around the separated chromatids.

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The condensed chromatids start thinning into chromatin fibre along with reappearance of the nucleolus and the cleavage furrow deepening further.

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Finally as the nuclear membrane becomes fully intact, the cleavage furrow deepens and split the cells from middle into two daughter cells.