The Cell Cycle

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Cell Biology

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The Cell Cycle

The Cell Cycle

Stage 1. InterphaseInterphase prepares the cell for mitosis. During interphase, organelles and DNA are replicated and cell growth occurs. Interphase ensures that the cell is the right size and has everything it needs to go through mitosis. The three parts of interphase are Gap 1, Synthesis, and Gap 2. In the gap stages, organelles are replicated and growth occurs. In synthesis, DNA is replicated.

Stage 2 (Phase 1). ProphaseDuring prophase, chromosomes condense, nucleoli dissappear, the nuclear membrane breaks down, centrioles move toward the poles, and spindle fibers form.

MitosisMitosis is the division of the cell's nucleus and it's contents. It consists of 4 phases and cytokinesis. The end result of mitosis is an identical daughter cell.

The cell cycle makes a genetically identical copy of a cell. This allows for growth and repair of an organism.

Stage 3 (Phase 2). MetaphaseDuring metaphase, spindle fibers attach to the centromeres of the chromosomes, and the chromosomes line up in the middle of the cell.

Stage 4 (Phase 3). AnaphaseDuring anaphase, sister chromatids separate to opposite sides of the cell.

Stage 5 (Phase 4). TelophaseDuring telophase, new nuclei form, the nuclear envelope reforms, spindle fibers break down, and chromosomes begin to uncoil.

Stage 6. CytokinesisDuring cytokinesis, the cell separates into two genetically identical daughter cells. In a plant cell, this happens by the formation of a cell plate, and in an animal cell, the membrane just pinches closed. The resulting daughter cells can then go through the cell cycle themselves, forming even more new cells.

By: Gina Dunnivant1st pd.


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