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QUESTION

What are the eight stages of mitosis?

Interphase (##G1##, ##S##, ##G2##), Prophase, Metaphse, Anaphase, Telophase and Cytokinesis

Interphase There are three phases: 1. ##G1## (Gap 1) phase. Cell synthesizes mRNA and proteins in preparation for division. Sometimes a cell can enter ##G_0##, this phase is known as apoptosis, programmed cell death. If there is a mutation or defect recognized, the cell will not divide and die. 2. ##S## (Synthesis) phase. DNA is duplicated. 3. ##G2## (Gap 2) phase. Cell continues to grow in preparation for mitosis 4. Prophase --Chromatin condenses into chromosomes, and centrioles move to opposite sides of cell. 5. Metaphase (sometimes further divided into Prometaphase and Metaphase)--nuclear membrane finishes dissolving. Chromosomes line up at middle of cell, and microtubules attach at kinetochores. 6. Anaphase --Chromosomes separate at kinetochores; one of each pair moves to either side of cell. 7. Telophase --Chromosomes reach opposite sides of cell, and new nuclear membranes begin to form around them. 8. Cytokinesis --A cleavage furrow forms between the cell, splitting it apart into two daughter cells.

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