BIOL 1000 Chapter Notes - Chapter 9: Sister Chromatids, Nuclear Membrane, Chromosome Segregation
21 Apr 2014
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Document Summary
Cytokinesis is the division of the cytoplasm. Chromosome segregation the equal distribution of daughter chromosomes to each of the two cells that result from cell division. The longest phase in mitosis is the interphase where cell grows and duplicates. In interphase there is g1 phase, s phase then g2 phase. During prophase chromosomes condense into rod like structures and the nucleolus disappears, meaning that rna synthesis disappears. During prometaphase the nuclear envelope breaks down and spindles form, and chromosomes attach to spindles. During metaphase the chromosomes are ligned up at the spindle midpoint. During anaphase sister chromatids separate and move to opposite spindle poles. During telophase the spindle disassembles and chromosomes decondense and nucleolus and envelope reappear. Animal cells use furrowing and plants use cell plate formation in cytokinesis. Animal cells use centrosomes to create spindle fibers, and plant cells don"t need them.
