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Download Photoandresp cells _ miosis and meiosis1
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Photosynthesis and Respiration Photosynthesis: plant cells making glucose for energy light 6 CO2 + 6H2O carbon dioxide water → C6H12O6 glucose + 6O2 oxygen This process is the opposite of respiration. It stores energy from the sun in the form of food. Respiration: all cells release energy when they “burn” fuel/food This process is the opposite of photosynthesis. Respiration RELEASES energy from fuel/food. Mitosis Meiosis Mitosis •is the process in which the nucleus divides to form two new nuclei. • produces two daughter cells that are identical to the parent cell. Animated Mitosis Cycle http://www.cellsalive.com/mitosis.htm • Interphase • Prophase • Metaphase • Anaphase • Telophase & Cytokinesis Interphase Parent Cell Cell prepares for division by: •Chromosomes are copied (# doubles) Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm Prophase Mitosis begins (cell begins to divide) • •Nucleus disappears . Centrioles (or poles) appear and begin to move to opposite end of the cell. between the poles. Metaphase Chromosomes line up in the Middle Anaphase •Chromosomes separate and move to opposite sides. Telophase •The cell divides into two. (Two new nuclei form) •The nucleus re-forms • Cell membrane moves inward to create two daughter cells – each with its own nucleus with identical chromosomes. Animal Mitosis -- Review Interphase Prophase Metaphase Anaphase Telophase Interphase 17 - Cell Division 18 18 http://www.cellsalive.com/mitosis.htm Meiosis Produces sex cells Sperm eggs Goes through the same phases as mitosis, only it goes it twice Produces 4 new cells Meiosis = half number of chromosomes Prophase II Second Division Telophase II Metaphase II Four cells with half the number of chromosomes as the original cell Anaphase II Daughter Cells Summary http://media2.caboces.org/htbin/wwform/118?T=CV1160 5#multimedia_resources_CV11605 http://www.powermediaplus.com/player.asp?mediaID=11605&se gmentID=150603 •mitosis: interphase, prophase, metaphase, anaphase, and telophase = 2 cells •meiosis: prophase 2, metaphase 2, anaphase 2, and telophase = 4 daughter cells
