Friday, March 2, 2012

What are the phases of mitosis?

The first phase of mitosis in interphase. Interphase proceeds in 3 stages. Growth 1, synthesis and growth 2. Interphase is a phase of the cell cycle, defined by the absence of cell division. During interphase the cell obtains nutrients, and duplicates its DNA. Throughout the G1 phase of interphase is when the cell grows and replicates its organelles. During Synthesis, the cell synthesizes its DNA. Lastly, during G2 the chromosomes begin to condense and assembly of the spindle begins.



 



The second phase of mitosis is Prophase. This is the preparation phase for the cell. The nucleus dissolves and the chromatin condenses into chromosomes.



 





The third phase of mitosis is metaphase. During this phase, the chromosomes line up in the middle of the cell to prepare to be pulled apart during anaphase.



Metaphase of Mitosis - Cell Division








The fourth phase of mitosis is anaphase. During this phase the chromosomes are pulled apart by the centrioles.




 Anaphase of Mitosis - Cell Division








The fifth phase of mitosis is telophase. throughout this phase the cells nucleus reforms.




 Telophase of Mitosis - Cell Division


The sixth and final phase of mitosis is cytokinesis. This is when the cytoplasm divides and the cell splits into two.







 Cytokinesis of Mitosis - Cell Division




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