Asexual Reproduction...1 1 Asexual Reproduction Mitosis and the Cell Cycle Mitosis is the process in...
Transcript of Asexual Reproduction...1 1 Asexual Reproduction Mitosis and the Cell Cycle Mitosis is the process in...
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Asexual Reproduction Mitosis and the Cell Cycle
Mitosis is the process in which
the nucleus divides to form two
new nuclei. How does mitosis
differ in plants and animals?
Mrs. Camp
7th Grade Life Science
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How do little elephants grow up to be BIG elephants?
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The process of asexual
reproduction begins after a sperm fertilizes an egg.
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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.
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Animated Mitosis Cycle http://www.cellsalive.com/mitosis.htm
• Interphase
• Prophase
• Metaphase
• Anaphase
• Telophase & Cytokinesis
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• 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
MEMBRANE Nucleus
Cytoplasm
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Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
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• 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
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Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
Spindle fibers
Centrioles
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• Chromatids (or pairs of chromosomes) attach
to the spindle fibers.
Centrioles
Spindle fibers
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Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
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• Chromatids (or pairs of chromosomes)
separate and begin to move to opposite
ends of the cell.
Centrioles
Spindle fibers
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Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
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• Two new nuclei form.
• Chromosomes appear as chromatin (threads
rather than rods).
• Mitosis ends.
Nuclei Nuclei
Chromatin
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Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
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• Cell membrane moves inward to create two
daughter cells – each with its own nucleus
with identical chromosomes.
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Animal Mitosis -- Review
Interphase
Prophase
Metaphase
Anaphase
Telophase
Interphase
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Plant Mitosis -- Review
Interphase
Prophase
Metaphase
Anaphase
Telophase
Interphase
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Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
IPMATC
I Practice More After The Concert
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- Cell Division
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