Biolog 9 - Chapter 9 Mitosis and Cell Reproduction A Cell...

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Chapter 9: Mitosis and Cell Reproduction A. Cell Division Mechanisms Cytoplasmic division in Eukaryotes helps 1. Increase body size 2. Replace dead cells 3. Repair damaged tissues Each daughter cell receives a required number of chromosomes and cytoplasm and the cell nucleus always divides first. Meiosis also precedes formation of gametes and is the basis of sexual reproduction in eukaryotes. B. Cell Cycle Interphase - the cell grows by producing proteins and cytoplasmic organelles, copies its chromosomes, and prepares for cell division. Interphase has three subphases: the G 1 , S, and G 2 phases Chromosomes are duplicated only during the S phase. Prophase - the chromosomes are tightly coiled, with sister chromatids joined together. The nucleoli disappear. The mitotic spindle begins to form. The centrosomes move away from each other, apparently propelled by lengthening microtubules. Metaphase
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This note was uploaded on 12/03/2011 for the course CHEM BIO P 101 taught by Professor Kk during the Spring '11 term at Rochester.

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Biolog 9 - Chapter 9 Mitosis and Cell Reproduction A Cell...

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