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The Cell Cycle

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Eunice Kang

on 30 January 2011

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Transcript of The Cell Cycle

The Cell Cycle Procaryotes Eukaryotes The Cell Cycle by Eunice Kang, Kathleen Joo, Rhaime Kim 8C Eukaryotic Cell Cycle Prokaryotic Cells
(Binary Fission) The cell starts out with the basic structure, having a single nucleus The first stage, INTERPHASE begins to take place, having the chromosomes duplicate. Two chromatids make up one chromosome. This is the first step of MITOSIS. It is called PROPHASE- the second step of the entire eukaryotic cell cycle. From an original thread-like strand structure, the chromatids become thicker. Also, the chromosomes become more distinct than as they were back in the first phase of Interphase. Fibers begin to extend, as the phase transitions over to the second stage of MITOSIS. The chromosomes line up along the equator of the cell, having the nuclear membrane be dissolved. Fibers are present on each side of the chromosomes. (One for each chromatid) This phase is METAPHASE, the 3rd phase of the cell cycle and the 2nd phase of MITOSIS The chromatids begin to separate, in order to move to opposite sides of the cell. This is ANAPHASE, the 3rd phase of MITOSIS, and the 4th step of the cell cycle. The chromatids move to opposite sides of the cell. This is right before the next phase- TELOPHASE Now, in the final phase of MITOSIS and the 5th phase of the whole cell cycle, a new nucleus membrane starts to build up around each set of chromosomes. This is TELOPHASE. For cells with no cell wall, the cell splits into two new, and identical cells. This is what was shown in the video. However, if the cell has no cell wall, which was NOT shown in our video, a cell plate will form, splitting the cell into two. Two new identical cells have formed, identical to each other AND the original cell. This last phase is called CYTOKINESIS. This is a process for dividing prokaryotic cells.
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