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Mrs. Werner Biology Midterm Phases
Phases
8
Biology
9th Grade
01/19/2012

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Term
Cytokinesis
Definition
cytoplasm is divided in half; 2 separate cells are formed; each cell recieves an identical recieves 1/2 of the original cells cytoplasm
Term
g1 phase
Definition
cell grows rapidly; organelles are duplicated; cells that are dividing remain in this phase
Term
s phase
Definition
DNA is copied; at the end of the phase, each chromosome consists of two chromatids attachted to the centromere
Term
g2 phase
Definition
preparations are made for the nucleus to divide; microtubules are assembled into centrioles to move the chromosomes
Term
prophase
Definition
DNA condenses into short thick rods; centrioles move to the opposite sied of the cell; nuclear membrane and nucleus break down; fibers begin to move chromosomes
Term
metaphase
Definition
paired chromatids move to the equator (middle) of the cell
Term
anaphase
Definition
paired chromatids separate; chromosomes are pulled apart y the fibers, centromere first; an equal number of chromosomes move to each pole of the cell
Term
telophase
Definition
spindle fibers break; nucleolus reappears; nuclear membrane forms around chromosomes
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