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Published byCuthbert Gallagher Modified over 6 years ago
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The Cell Cycle The Life Cycle of a cell : includes Growth, Development, and Reproduction
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Importance of Cell Division
Growth of Organism Repair Reproduction for some organisms
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Phases of the Cell Cycle
1. Interphase Growth and normal functions (G1) DNA replicates – makes a copy of itself (S) Sister chromatids are held together by the centromere Organelle replication
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Interphase
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2. Mitosis Prophase DNA condenses forming chromosomes
Nuclear membrane breaks down Spindle fibers form between centrioles
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Prophase
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Mitosis continued Metaphase
Replicated chromosomes line up across the middle of the cell Chromosomes attach to the spindle fibers at the centromere, which is still holding the chromatids together
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Metaphase
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Anaphase Mitosis continued
Spindle fibers pull the two chromatids in opposite directions causing the centromere to split Chromatids move to opposite sides Cell becomes stretched
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Annaphase
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Telophase Chromatid unwind forming chromatin
Mitosis continued Telophase Chromatid unwind forming chromatin New nuclear membrane forms around each set of chromatin
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Telophase
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3. Cytokinesis Cell cycle
Cell membrane pinches together forming two cells Cell plate form in plant cells , eventually forms cell membrane and wall
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Cytokinesis
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Results of Cell Division
Parent cell no longer exists Two daughter cells with identical DNA to the parent cell form
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The cell cycle INTERPHASE S (DNA synthesis) G1 G2 Cytokinesis Mitosis
MITOTIC (M) PHASE
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Animal Mitosis -- Review
Interphase Prophase Metaphase Anaphase Telophase Cytokinesis
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Plant Mitosis -- Review
Interphase Prophase Metaphase Anaphase Telophase Cytokinesis
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The Cell Cycle
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