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Published byElmer Byrd Modified over 9 years ago
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Mitosis Cell Reproduction
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HOW DOES AN ORGANISM GROW?
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HOW DOES AN ORGANISM GET BIGGER?
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Mitosis Notes Asexual Reproduction – offspring are produced that are genetically identical to the parent Mitosis – the asexual reproduction process of cell division
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Interphase What happens? Chromosomes are present but not visible DNA replicates How the cell normally looks
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INTERPHASE When the cell performs its function (example: muscle cells contract and expand during interphase to help you move) Cell gets bigger (makes more cytoplasm and organelles) Cell copies DNA
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Part of mitosis? Interphase is part of the cell’s life cycle; but it is NOT a stage of mitosis
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Prophase What happens? Nuclear membrane disappears Chromosomes appear Centrioles begin to move
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PROPHASE DNA (which was loose in nucleus) gets tightly wound into chromosomes Nucleus dissolves
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Metaphase What happens? Spindle fibers line the chromosomes up in the middle of the cell
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METAPHASE Chromosomes line up in the center of the cell Spindle fibers attach to each chromosome
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Anaphase What happens? The spindle fibers pull the chromosomes apart at the middle
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ANAPHASE Chromosomes are pulled to opposite ends of the cell
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Telophase What happens? Nuclear membrane reappears Chromosomes disappear The cell begins to be pinched in the middle
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TELOPHASE A new nucleus forms around each set of chromosomes. This produces one cell with two nuclei
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Cytokinesis What happens? The cell is pinched in half Two identical cells are made
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CYTOKINESIS A new cell membrane (and cell wall in plants) is created between the two new cells. TWO IDENTICAL CELLS ARE FORMED
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The Phases of Mitosis Interphase 1. Prophase 2. Metaphase 3. Anaphase 4. Telophase 5. Cytokinesis Mnemonic Device P lease M eet A t T he C ircus
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Mitosis Notes During cell division … It is essential that the DNA is replicated The number of chromosomes NEVER changes Each daughter cell gets its own copy of the DNA
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http://www.cellsalive.com/mitosis.htm http://www.cellsalive.com/cell_cycle.htm
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Using the textbook define the following terms Mitosis Cytokinesis Centromeres Interphase Cell cycle Spindle
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