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Cell Division: Mitosis

Cell Division: Mitosis. Ms. Atchley 7 th Grade Science. WARM Up:. Objective:. Understand the purpose of mitosis Understand the process of mitosis Explain the sequence and events of each phase Introduction Video. Review:. What are the two types of cells?. Eukaryotic.

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Cell Division: Mitosis

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  1. Cell Division:Mitosis Ms. Atchley 7th Grade Science

  2. WARM Up:

  3. Objective: • Understand the purpose of mitosis • Understand the process of mitosis • Explain the sequence and events of each phase • Introduction Video

  4. Review:

  5. What are the two types of cells? • Eukaryotic • Prokaryotic

  6. What are prokaryotic cells? • Simple cells • Few internal structures • No membrane bound organelles • One-celled organisms, Bacteria

  7. Examples of prokaryotic cell: Bacteria Cells

  8. How do prokaryotic cells divide? • Binary Fission • (A fancy name that scientists use to impress their girlfriends or boyfriends. A process where one prokaryotic cell becomes two.)

  9. What are eukaryotic cells? • Cells that contain organelles surrounded by membranes • Most living organisms

  10. Examples of eukaryotic cells: Plant Cells Animal Cells Human Cells Human Cells

  11. How do eukaryotic cells divide? • Mitosis! • Prophase- The cell prepares for nuclear division • Metaphase- The cell prepares chromosomes for division • Anaphase- The chromosomes divide • Telophase- The cytoplasm divides • Cytokinesis- The cell divides into two identical cells • Mitosis Phases Video

  12. What is mitosis? • The continuous process of four stages of cell division which results in the production of two identical daughter cells from a single parent cell. Making more cells for growth and repair!

  13. STOP HERE

  14. Why do we study diagramsfirst? • Easy to identify structures • Clear • Simple

  15. Are the cells really pink and purple? • Nope, they are stained so that we can see the organelles better.

  16. The Phases of Mitosis Prophase Metaphase Anaphase Telophase

  17. Interphase This cell is shown, as this is how all cells look before mitosis. Please be aware that Interphase is a phase of the cell cycle, but NOT a stage of mitosis. diagram microscopic image

  18. Prophase The nuclear membrane breaks down, chromosomes shorten and thicken. The other structures important for mitosis are also forming diagram microscopic image

  19. Metaphase- Middle The spindle has now formed and the nuclear membrane has broken down. The chromosomes are lined up along the cell's center and are attached to the spindle fibers. diagram microscopic image

  20. Anaphase- Away The newly formed chromosomes are pulled along the spindle toward opposite poles of the cell. diagram microscopic image

  21. Telophase The chromosomes have finished their migration to the poles. The cell membrane pinches in along the center creating two separate cells . The division of the cytoplasm is called cytokinesis. The division of the nucleus is Mitosis. Microscopic Image diagram

  22. They all look like blobs… how can we tell them apart?

  23. Human Cheek Cell (40X Magnification)

  24. Human Cheek Cell (40X Magnification)

  25. Stages of Mitosis (with Interphase)

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