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Mitosis

This video provides an overview of mitosis, including the stages - interphase, prophase, metaphase, anaphase, telophase, and cytokinesis. Learn about the importance of cell reproduction and the formation of new cells. Discover how chromosomes replicate and move during each stage. Understand why cells reproduce and the implications of cells that are not exact copies, such as cancer cells.

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Mitosis

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Presentation Transcript

  1. Mitosis Video Clips of the Process of Cell Division

  2. History and Intro to Mitosis

  3. Interphase

  4. Interphase Review • Resting stage • Chromosomes thicken up and become visible • Homologous pairs • Two chromosomes with the same traits • 23 pairs in humans

  5. Prophase

  6. Prophase • Nuclear membrane begins to disappear • Chromosomes produce copies of themselves • Knot in middle is called a centromere

  7. Metaphase

  8. Metaphase • Centrioles move to opposite ends of the cell • Spindle fibers go between the centrioles • Chromosomes are fastened to the spindle fibers at the centromere • Chromosomes line up in the middle of the cell

  9. Anaphase

  10. Anaphase • Chromosome pulls apart at the centromere • Chromosomes move to opposite ends of the cell

  11. Telophase

  12. Telophase • Two new cells are formed • Nuclear membrane returns • Comparison of new cell with original cell • Same numbers of chromosomes • Same chromosomes (with traits) • Cytokinesis – division of cytoplasm • Animal (cell membrane) pinches • Plant (cell wall) grows from edges to middle

  13. Why do cells reproduce? • To replace old cells • To heal wounds • To grow

  14. What are cells called that are not exact copies of the original cells? • Cancer cells

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