CELL DIVISION
CELL DIVISION AND CANCEROUS CELLS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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prophase-nuclear envelope breaks down
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metaphase-the chromosomes are aligned in the middle of the cell
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telophase-the nuclear envelopes re-forms in the daughter cells
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anaphase-the chromosomes de-condense
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Detailed explanation-1: -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.
Detailed explanation-2: -During anaphase sister chromatids have been separated and reside at opposite poles of the cell. During telophase both sets of chromatids are surround by new nuclear membranes and chromosomes decondense into chromatin.
Detailed explanation-3: -The stage before anaphase, metaphase, the chromosomes are pulled to the metaphase plate, in the middle of the cell. Although the chromosomes were heavily condensed in the start of cell division, they continue to condense through anaphase.
Detailed explanation-4: -One of the key steps in mitosis is chromosome condensation – the compaction of the chromatin into well-defined rod-shaped structures (for other recent reviews, see 1– 3).