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KEY CONCEPT Cells divide during mitosis and cytokinesis.

Learn about the process of cell division through mitosis and cytokinesis, including the condensation of chromosomes, formation of spindle fibers, separation of sister chromatids, and cytoplasm division. This informative guide provides an in-depth explanation of each phase and how it leads to the formation of genetically identical daughter cells.

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KEY CONCEPT Cells divide during mitosis and cytokinesis.

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  1. KEY CONCEPT Cells divide during mitosis and cytokinesis.

  2. DNA andhistones SupercoiledDNA DNA doublehelix Chromatin Chromosomes condense at the start of mitosis. • DNA wraps around proteins (histones) that condense it.

  3. chromatid centromere telomere Condensed, duplicated chromosome • DNA plus proteins is called chromatin. • One half of a duplicated chromosome is a chromatid. • Sister chromatids are held together at the centromere.

  4. Parent cell centrioles spindle fibers centrosome nucleus with DNA Mitosis and cytokinesis produce two genetically identical daughter cells. • Interphase prepares the cell to divide. • During interphase, the DNA is duplicated.

  5. Interphase

  6. During prophase, chromosomes condense and spindle fibers form, nuclear membrane disappears • Mitosis divides the cell’s nucleus in four phases.

  7. During metaphase, chromosomes line up in the middle of the cell. • Mitosis divides the cell’s nucleus in four phases.

  8. Metaphase

  9. During anaphase, sister chromatids separate to opposite sides of the cell. • Mitosis divides the cell’s nucleus in four phases.

  10. Anaphase

  11. Mitosis divides the cell’s nucleus in four phases. • During telophase, the new nuclei form and chromosomes begin to uncoil.

  12. Telophase and Cytokinesis

  13. In animal cells, the membrane pinches closed. • In plant cells, a cell plate forms. • Cytokinesis differs in animal and plant cells.

  14. Cytokinesis – Cytoplasm Division Animal Cell Cleavage Furrow Plant Cell Cell Plate

  15. Let’s Review the Events of the Cell Cycle • Cell Cycle Video • Cell Cycle Video #2 • Cell Cycle tutorial #1 • Cell Cycle tutorial #2 • Animal Cell Division • Plant Cell Division#1 • Plant Cell Division #2

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