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What is Mitosis?

What is Mitosis?. A form of cell division. Asexual reproduction in unicellular organisms. Growth and Repair in multicellular organisms. Types of Asexual Reproduction. Fission The equal splitting of a cell through mitosis to form two new cells. Budding

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What is Mitosis?

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  1. What is Mitosis? • A form of cell division. • Asexual reproduction in unicellular organisms. • Growth and Repair in multicellular organisms.

  2. Types of Asexual Reproduction • Fission The equal splitting of a cell through mitosis to form two new cells. • Budding The unequal splitting of a cell through mitosis to form on parent cell and one daughter cell.

  3. Why do Cells Reproduce? • To make more organisms of the same species (unicellular organisms). • To grow (multicellular organisms) • To repair damaged tissues (multicellular organisms).

  4. Why does Mitosis occur? • When cells get too big they can no longer get enough nutrients through the cell membrane in order to sustain it’s entire self. • In other words it does not have enough surface area to diffuse in enough nutrients or diffuse out all wastes.

  5. Mitosis can be explained in Phases • Regular cell activity and Mitosis can be explained in 5 basic phases. • The phases are Interphase, Prophase, Metaphase, Anaphase and Telophase.

  6. Interphase Chromatin • Normal activities of the cell are performed. • Chromatin is doubled at the end of this phase. Interphase – In Between

  7. Prophase Doubled Chromosomes • Chromatin condenses into chromosomes. • Centrioles migrate to the poles. • Spindle fibers begin to form. • Nuclear membrane begins to break down. Sister Chromatids Prophase - “Preparing”

  8. Metaphase Pole • Chromosomes line up on the equatorial plane. Equator Metaphase – “Middle”

  9. Anaphase • Spindle Fibers pull the Sister chromatids apart. • Single chromosomes move toward the poles. Anaphase – “Away” or “Apart”

  10. Telophase • Single stranded chromosomes arrive at the poles. • Nuclear membranes form. • Cytokinesis (pinching in) begins. Telophase – “Two”

  11. How can we remember all these phases? • I . P . M . A . T. NTERPHASE NAPHASE ROPHASE ELOPHASE ETAPHASE

  12. Animations • Mitosis Animation • Mitosis by a spanish Robert Miles • Pokemon Mitosis

  13. Meiosis vs. mitosis In order to understand meiosis, a comparison to mitosis is helpful. The table below shows the differences between meiosis and mitosis.

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