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3.3a Cell Division


The Cell Cycle Monitored by checkpoints before passing to the next phase
Apoptosis programmed cell death
G1 occupies most of the cell's life, 90%; carries out routine functions; cell growth;
S phase replication of DNA
G2 other organelles replicate and cell prepares for cell division; chromatin (uncoiled DNA) begins to tighten and coil into chromosomes
Prophase Chromosomes are present; nuclear envelope breaks down; centrioles migrate to polar ends, and mitotic spindle forms
Metaphase chromosomes line up along the middle of the cell, mitotic spindle attaches to the centeromere of each chromosome
Anaphase mitotic spindles shorten, drawing sister chromatids apart
Telephase Nuclear envelope begins to reform and cytokinesis begins
Cytokinesis division of the cytoplasm
cleavage furrow seen by narrowing of the cell membrane pinching inward
Transcription DNA to RNA
Translation RNA to "amino acid" protein
centromere the area of DNA chromosomes where sister chromatids join; the middle of the X of replicated chromosomes
chromatin Uncoiled chromosomes/DNA
Sister chromatids 2 identical sides of DNA in a chromosome; joined by the centromere
Created by: dfosterteacher