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Transcript
Warm-up Questions: • During what phase of the cell cycle is DNA replicated to prepare for mitosis? • On average, how much time does a cell spend in mitosis during the cell cycle? CANCER AND THE CELL CYCLE CARCINOGENS, DISRUPTION, DISEASE CANCER AND CELL CYCLE • Cancer is caused by unregulated cell growth. Cancer is not contagious. However, people can be genetically more likely to develop cancer. Most cells spend a much greater amount of time in interphase and not duplicating. WHEN THE CELL CYCLE GOES WRONG Checkpoints along the cell cycle verify that cells are finishing each step in the cycle properly. If a cell does not pass a checkpoint, it will destroy itself (apoptosis). This ensures that you have healthy, properly functioning cells. Cancer cells ignore these checkpoints and grow rapidly and separate far more frequently than they should. The build up of cells is when tumors form. Cancer cells are cells that have lost their ability to control their rate of mitosis. Cancer Video CANCER BROCHURE • This will be a summative grade and is due on Monday, November 9.