Mitosis Review Notes and Worksheet Key, Exercises of Biology

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Key —_ My fos35 Rec ase faclet Mitosis Notes Cell division occurs in a series of stages, or phases. Ist: INTERPHASE =. Chromosomes are copied.) {0:17 9%) * Chromosomes appear as threadlike coils (chromatin) at the start, but each chromosome and its copy @ (sister chromosome) change to sister chromatids at end of this phase 2 Sister chromatids SC=— Centramere Mitosis begins (cell begins to divide) Centrioles (or poles) appear and begin to move to opposite ends of cell ¢ Spindle fibers form between the poles » Chrowactin Coils to “chromo somes’ Nutr mombrane + nuclolus disopaer ¢ Chromatids (or pairs of chromosomes) attach to the spindle fibers ==. Sistit chromatids Centromeres (ine up on the equocor 2nd: PROPHASE 7 3rd: METAPHASE Chromatids (or pairs of chromosomes) separate and begin to move to opposite ends of the cell Sister =@ chromatids E€ split Two new nuclei form * Chromosomes appear as chromatin (threads rather than rods) Mitosis ends 6th: CYTOKINESIS . Cel] membrane moves inward to create two daughter cells - each with its own nucleus with identical chromosomes aang ee complatel “pnchus® cell in half ilar ceils Wet idankeal DNA content e ori ginal Pavent: Cel/