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ICSE BIOLOGY CELL DIVISION NOTES

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Tanay Nayak
Avalon Heights International School, Mumbai

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Cell division Q1. Difference between Mitosis and Meiosis Where it occurs What for When it occurs Number of daughter cells produce Number of chromosomes passed on to each daughter cell Number of nuclear division Identity of chromosomes and genes in daughter cell Mitosis In the somatic (body) cells. To provide for growth and replacement. Continuously throughout life. Two daughter cells. Full set of chromosomes is passed on to each daughter cell. This is the diploid (2n) number of chromosomes. A single nuclear division after chromosome duplication. Identical. Meiosis In reproductive cells. Only for gamete formation. Only in reproductively active age. Four daughter cells. Only half the number of chromosomes is (only one member from each pair). This is haploid (n) number of chromosomes. Followed by two nuclear divisions after chromosomes duplication. Randomly assorted between the gametes produce. This results in genetic variations. Q.2 Mention the phases of mitosis. (i) Prophase Centrioles start moving apart and reach opposite poles. Chromosomes because distinct. Chromosomes are already duplicated as paired chromatids. 1

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Additional Info : ICSE Biology Notes by Bhomik Acharya (bhomik1018)
Tags : icse bio cell division, ICSE Notes and Tips.

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