Ch 12 Review - Chapter 12 Redux Genome the genetic...

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Chapter 12: Redux Genome : the genetic information of a cell Chromosomes are made of chromatin, a complex of DNA and associated protein molecules Mitotic spindle: forms during prophase, fibers made of mictrotubules and proteins o Gain and lose subunits of tubulin to grow and shorten, assembly of spindle microtubules starts at the centrosome which organizes the microtubules o During interphase, the centrosome replicates, the two centrosomes move apart during prophase and prometaphase and spindle microtubules grow from them o Aster - radial array of short microtubules that extend from each centrosome o Kinetochore - each of two sister chromatids has a kinetichore, structure of proteins associated with specific sections of chromosomal DNA at the centromere, spindle fibers attach to these during prometaphase G2 of Interphase o Nuclear envelope, nucleoli present o Two centrosomes have formed, each with two centrioles o Chromosomes have duplicated but not condensed Prophase o
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