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| Point in the cell cycle where a cell pauses to make sure everything is proceeding correctly |
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| The first checkpoint at the end of G1. If the cell passes through this checkpoint, it will go on and divide |
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| Non-dividing state; cells that do not pass the first checkpoint or restriction point fall into this non-dividing state |
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| Occurs at the beginning of G2; it makes sure that all of the chromosomes have been copied correctly |
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| Occurs during metaphase; makes sure that every sister chromatid has a spindle fiber attached to it. |
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| Mass of cells formed by uncontrolled cell growth |
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| A harmless tumor; it does not spread |
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| Uncontrolled cell growth due to a failure in the regulation of the cell cycle |
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| The spread of a cancerous tumor to another location in the body |
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| A substance that can cause cancer |
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| Examples of known carcinogens |
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| Certain chemicals like those in tobacco smoke, radiation like X-rays and UV light, random mutations in DNA, some genes |
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| The programmed loss of webbing between your fingers and toes during fetal development. |
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