Quizlet

Flashcards: Bio Final Review: 10

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Why are Cells Small??the larger a cell grows, the more demands the cell places on its DNA; in addition, the cell has more trouble moving enough nutrients & wastes across the cell membrane
Events of Cell CycleG1 phase, S phase, G2 phase, M phase
Mitosis (4 stages)Prophase, Metaphase, Anaphase, & Telophase
Prophasechromatin condenses into chromosomes; centrioles seperate and a spindle begins to form; the nuclear envelope breaks down
Metaphasechromosomes line up across the center of the cell; each chromosome is connected to a spindle fiber at its centromere
Anaphasethe sister chromatids seperate into individual chromosomes and are moved apart
Telophasethe chromosomes gather at opposite ends of the cell and lose their distinct shapes; 2 new nuclear envelopes will form
Cytokinesisthe division of the cytoplasm
Chromosomesthreadlike structures within the nucleus containing the genetic info that is passed from one generation of cells to the next
Chromatid1 of 2 identical "sister" parts of a duplicated chromosome
p53involved in cancer cells; normally halts the cell cycle until all chromosomes have been properly replicated; damaged or defective p53 genes cause the cells to lose the info needed to respnd to signals that would normally control their growth