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Mitosis from FTCC
 

Mitosis from FTCC

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    Mitosis from FTCC Mitosis from FTCC Presentation Transcript

    • Asexual Reproduction Mitosis Mitosis is the process in which the nucleus divides to form two new nuclei. How does mitosis differ in plants and animals? 1 1
    • 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 CELL Nucleus MEMBRANE Cytoplasm
    • Unreplicated vs. replicated chromosome During which part of the Cell Cycle does replication of DNA occur . . . Interphase, or Cell Division (Mitosis or Meiosis)?
    • 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. 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. Nuclei Nuclei Chromatin
    • Animal Cell Plant Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
    • • Cell membrane moves inward to create two identical daughter cells – each with its own nucleus with identical chromosomes. • Daughter cells are IDENTICAL to the original parent cell.
    • Animal Mitosis -- Review Interphase Prophase Metaphase Anaphase Telophase Interphase
    • Plant Mitosis -- Review Interphase Prophase Metaphase Anaphase Telophase Interphase
    • 23
    • http://www.cellsalive.com/mitosis.htm