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2.5 Cell division by Mitosis

2.5 Cell division by Mitosis. The cell cycle. Cytokinesis is the splitting of the cytoplasm between the dividing cells. It occurs at the end of telophase . The ‘daughter’ cells are genetically identical. http://www.personal.psu.edu/staff/d/r/drs18/bisciImages/cycle.jpg.

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2.5 Cell division by Mitosis

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  1. 2.5 Cell division by Mitosis

  2. The cell cycle • Cytokinesis is the splitting of the cytoplasm between the dividing cells. It occurs at the end of telophase. The ‘daughter’ cells are genetically identical. http://www.personal.psu.edu/staff/d/r/drs18/bisciImages/cycle.jpg

  3. Interphase is an active period in the life of a cell when many metabolic reactions occur, including protein synthesis, DNA replication and an increase in the number of mitochondria and/or chloroplasts.

  4. http://www.lbah.com/images/rats/Mammary%20Tumor/rat7278.jpg • Tumours (cancers) are the result of uncontrolled cell division and that these can occur in any organ or tissue. http://epod.typepad.com/.a/6a0105371bb32c970b011570ed7b03970b-550wi http://perufoundation.org/yahoo_site_admin/assets/images/girl_with_tumor.164112107_std.jpg

  5. Mitosis in detail Sequence- Interphase Prophase Metaphase Anaphase Telophase Interphase Sequence- I P M A T I

  6. Important details…… • MiTosis makes Two genetically identical cells • When the chromosomes line up at the equator during metaphase they DO NOT line up in homologous pairs. • The two DNA molecules formed by DNA replication (during S-phase) are considered to be sister chromatids until the splitting of the centromere at the start of anaphase; after this, they are individual chromosomes.

  7. Why do Mitosis? • Because all the products are genetically identical Mitosis is not used for reproduction. Mitosis is used for: Growth, Embryonic development, Tissue repair Asexual reproduction

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