Cell Cycle
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Cell division is the process by which a cell replicates itself to produce two daughter cells. It involves a long interphase period where the cell grows and its DNA is copied, followed by mitosis where the nucleus and its chromosomes are divided into two identical copies through the stages of prophase, metaphase, anaphase and telophase. Cytokinesis then partitions the cytoplasm and organelles to complete the formation of the two new daughter cells.
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Cell Cycle
- 1. Cell Cycle and Cell Division
- 2. Cell Division - the process a cell undergoes in order to make copies of itself. Why do cells divide?
- 3. DNA & Chromosomes DNA is chromatin strands and chromosomes
- 4. Interphase (about 90% of the cell cycle time) Cell mature Chromosomes copy themselves
- 5. Mitosis: Prophase Nuclear membrane disappears Spindle fibers form at the poles of the cell
- 6. Mitosis: Metaphase Chromosomes line up at the middle 2 Spindle fibers attach to each centromere
- 7. Mitosis: Anaphase Centromeres split and the fiber strands pull the chromosomes to each pole
- 8. Mitosis: Telophase 2 new nuclei form at two poles of the cell where chromosomes have gathered Mitosis (division of one nucleus into two identical nuclei) is complete
- 9. Cytokinesis Two new daughter cells are formed