Saturday, December 21, 2013

Class 31

     Today in class we learned about the stages of mitosis and meiosis in the cell. First there is interphase which contains G1, S, and G2 phases before starting mitosis. A prokaryote cell goes through binary fusion because it does not have a nucleus or nuclear envelope. The G1 phase is growth of the cell and the S phase is DNA replication. The G2 phase gets the cell ready for mitosis. Protein synthesis occurs before the cell goes through mitosis. The cell can also stop at checkpoints and enters G0 phase where the cell just lives its normal life and does not go through mitosis. Mitosis is the splitting of chromosomes and ends with cytokinesis which is the splitting of cells into two daughter cells. There are 5 stages of mitosis, prophase, prometaphase, metaphase, anaphase, and telephase.



We then learned about meiosis

meiosis is a type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell, as in the production of gametes and plant spores.

We also got to see the stages of mitosis in microscopes and pictures 





We also practiced mitosis and meiosis with popsickle sticks 


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