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Transcript
Cell Cycle & Mitosis Cell Cycle & Mitosis What type of cell does mitosis? Eukaryote, Prokaryote, or Both only eukaryotic cells do mitosis Cell Cycle & Mitosis What happens when a unicellular eukaryote completes mitosis? In unicellular organisms Mitosis makes a new organism Does a new organism form through mitosis of a eukaryotic multicellular organism? No, a multicellular eukaryotic organism does not make a new organism through mitosis. Cell Cycle & Mitosis Then for what does a eukaryotic multicellular organism use mitosis? Cell Cycle & Mitosis Instead a multicellular eukaryotic organism uses mitosis for repair, growth, and development . Cell Cycle & Mitosis Do bacteria use mitosis to make new organisms? mitosis at all because bacteria have only one chromosome attached to a cell membrane and use fission to create more bacteria. Cell Cycle http://schoolworkhelp er.net/2010/11/cellcycles-interphasemitosis-cytokinesis/ Interphase not really mitosis premitosis • Interphase (before mitosis but often mistakenly put as part of mitosis) • G1 + S + G2 = Cell grows, makes more cytoplasm and organelles duplicate, copies DNA, and gets ready to divide Mitosis starts with Prophase • Remember Please Make Another Taco • Prophase, Metaphase, Anaphase, Telophase Prophase • Chromosomes pack up • Centrioles go to opposite sides of cell • Spindle fibers reach from centrioles to chromosomes • Nuclear membrane falls apart • Remember packed up the centrioles moved and spin a nuclear fall apart like a little military event Metaphase • During late prophase or into metaphase chromatids move to center are of cell • remember • At metaphase the chromatids met in the middle chromatids are aligned Anaphase • Chromatids move apart, toward opposite poles • remember • Sister Anna moved to the opposite side • Telophase Chromosomes are at opposite parts of the cell • nuclear membranes reforms around each set of chromosomes • chromosomes uncoil • spindle fibers fall apart • Remember telo like telecommunications so wires uncoil, fiber optics, at the end of any war you must rebuild so we started with membrane falling apart now it rebuilds Watch • MITOSIS • VIDEO OF MITOSIS IN AN ANIMAL CELL SHOWING ALL PHASES • http://bio.rutgers.edu/~gb101/lab2_mito sis/graphics/aavideo.mov • • Watch • ON AN ONION ROOT IDENTIFY ALL PHASES OF MITOSIS IPMAT • http://bio.rutgers.edu/~gb101/lab2_mito sis/section2_frames.html Watch • ON AN ANIMAL CELL IDENTIFY ALL PHASES OF MITOSIS • http://bio.rutgers.edu/~gb101/lab2_mito sis/section2_frames.html Mitosis ends here and cytokinesis is separate Cyto indicating a cell as in cytoplasm Kinesis as in movement after a stimuli Therefore Cytokinesis is……. Cytokinesis • Cytokinesis = splitting of the cytoplasm • Not an actual phase of mitosis. • The division of cytoplasm after separation of the chromosomes • In plant cells, a new cell wall forms to divide the two daughter cells (CELL PLATE) Interactive mitosis • http://esminfo.prenhall.com/science/Biol ogyArchive/audesirk/closerlook/mitosis. html