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1. Please have these Items on your desk. AR Book Agenda Puppy Drawing Two vocabulary Words: Prophase Metaphase Science Starters Sheet Prophase- Chromosomes condense. • Nucleolus disappears • Nuclear Membrane disappears Spindle fibers form and centrioles migrate to the poles of cells. Each chromosome becomes attached to a spindle fiber. • • • • Metaphase- Chromosomes align in the center of the cell. • Each chromosome attaches to a spindle fiber at its centromere Hang puppy drawing up. 2. Return graded papers. Put plant and animal cell drawings in NB 4. Take notes on Mitosis 5. Work on Mitosis worksheet(HW if not completed in class) 1. 3. Pages 74 & 75 12/8 Plant and animal cell drawing Page 77 12/8 Mitosis notes Mitosis Mitosis is the process in which the nucleus divides to form two new nuclei. How does mitosis differ in plants and animals? 5 5 How do little elephants grow up to be BIG elephants? The process of asexual reproduction begins after a sperm fertilizes an egg. Skin cancer - the abnormal growth of skin cells - most often develops on skin exposed to the sun. Cell that reproduce by asexual reproduction reproduce constantly. Animated Mitosis Cycle http://www.cellsalive.com/mitosis.htm • Interphase • Prophase • Metaphase • Anaphase • Telophase & Cytokinesis Chromosomes are copied (# doubles) • 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 • Nucleus CELL MEMBRANE Cytoplasm Animal Cell Plant Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm • • • Mitosis begins (cell begins to divide) Centrioles (or poles) appear and begin to move to opposite end of the cell. Spindle fibers form between the poles. Centrioles Sister chromatids Spindle fibers Animal Cell Plant Cell Spindle fibers Centrioles Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm Chromatids (or pairs of chromosomes) attach to the spindle fibers. • They line up in the middle. • Centrioles Spindle fibers Animal Cell Plant Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm • Chromatids (or pairs of chromosomes) separate and begin to move to opposite ends of the cell. Centrioles Spindle fibers Animal Cell Plant Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm • • • • Two new nuclei form. Chromosomes appear as chromatin (threads rather than rods). Mitosis ends. Cleaving begins. Nuclei Chromatin Nuclei Animal Cell Plant Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm 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 Plant Mitosis -- Review Interphase Prophase Metaphase Anaphase Telophase Interphase 25 - Cell Division P I M C A T 26 26 http://www.cellsalive.com/mitosis.htm
