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During cytokinesis the nuclear envelope, or nuclear membrane, that encloses the nucleus’s genetic material remains unchanged, as it was dissolved and reformed into two separate membranes in an earlier mitosis phase.

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During telophase, the sister chromatids reach opposite poles. The small nuclear vesicles in the cell begin to re-form around the group of chromosomes at each end.

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During anaphase, each chromosome's sister chromatids separate and move to opposite poles of the cell.

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During interphase, cellular organelles double in number, the DNA replicates, and protein synthesis occurs.

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During metaphase, the cell's chromosomes align themselves in the middle of the cell.

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During prophase, the parent cell chromosomes — which were duplicated during S phase — condense and become thousands of times more compact than they were during interphase.