Biology Ch 10, Section 3 Regulation Review

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Describe the effect of environmental conditions on the cell cycle
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G1 checkpoint--checks size and surroundings before entering the S phase.
G2 checkpoint--checks size and for mistakes in copying its DNA, and corrects mistakes before cell goes into mitosis
Mitosis checkpoint--checks that chromosomes are properly attached to the spindle fibers so separation can occur properly
A benign tumor is a defective growth of cells that does not spread to other parts of the body. Generally removed by surgery.
A malignant tumor is one that has invaded and destroyed nearby health tissue and organs. If cells break loose from the tumor and travel through the body forming additional tumors, they are said to have metastasized and are very difficult to treat