Cell Cycle & Mitosis
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Transcript of Cell Cycle & Mitosis
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Cell Cycle & Mitosis
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Cell CycleCell Cycle = IMPAT
I = InterphaseMPAT= Stages of Mitosis
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Cell Cycle
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Mitosis•Interphase (stage before mitosis!)
•G1 + S + G2 = Interphase
• Cell grows, makes more cytoplasm and organelles duplicate, copies DNA, and gets ready to divide
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Prophase
•Chromosomes shorten & thicken
•Centrioles move to opposite poles of the cell
•Spindle fibers extend from the centrioles toward each chromosome
•Nuclear membrane dissolves
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Metaphase
•During late prophase chromatids begin to move toward the cell equator (metaphase plate)
•At metaphase the chromatids are aligned at the equator
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Anaphase
•Chromatids begin to move apart, toward opposite poles
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Telophase
•Chromosomes reach opposite poles of the cell
•Spindle fibers dissolve
•Nuclear membrane reforms at each end of the cell
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Cytokinesis•Cytokinesis = splitting of the
cytoplasm
•Not an actual “phase of mitosis”.
•The division of cytoplasm after separation of the chromosomes
•In plant cells, a new cell wall forms to divide the two daughter cells (CELL PLATE)
•In animal cells, the cleavage furrow forms