9/15/08 Mitosis Prophase • Chromosomes condense • Nuclear membrane begins to break down • Microtubules become visible Metaphase • Chromosomes line up across center of the cell • Spindle fibers attach to centromeres Anaphase • Spindle fibers pull apart sister chromatids to either side of cell Telophase • “backwards prophase” • Spindle fibers dissapear • Nuclear membrane reforms • Chromosomes decondense Meiosis Two cellular divisions instead of one • During first meiotic division homologous chromosomes are separated instead of sister chromatids (in mitosis) o Crossing over also occurs in prophase I • In second meiotic division sister chromatids are separated resulting in eight
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This note was uploaded on 12/09/2008 for the course BIOL 303 taught by Professor Pfaffle during the Fall '08 term at Carthage.