Mitosis

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Mitosis
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What is Mitosis?

• Mitosis Cell division involving somatic
  (non-sex) cells
• Involves only diploid cells
• Form of asexual reproduction for some life
  (bacteria protista, fungi)
• End Result Two genetically identical daughter
  cells

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The Cell Cycle

• Defined Repeating set of events in the life of a
  cell
• 1) Interphase
• G1, S, G2
• 2) Prophase
• 3) Metaphase
• 4) Anaphase
• 5) Telophase

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Interphase

• Divided into 3 Stages
• G1 Stage
• Normal function performed
• Cell growth
• Organelles created
• S Stage
• DNA duplicated
• G2 Stage
• Cell growth
• Normal function performed

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Prophase

• 1st Mitosis Stage
• Chromatin coils into chromosomes
• Nucleus dissolves spilling the chromosomes
• Spindle fibers form

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Metaphase

• 2nd stage of mitosis
• Spindle fibers attach to centromeres of each
  chromosome
• Spindle fibers pull the chromosomes to the cells
  equator

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Anaphase

• 3rd stage of mitosis
• Spindle fibers pull ½ the chromatids to each end
  of the cell

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Telophase

• 4th stage of mitosis
• Spindle fibers dissolve
• Chromosomes unwind into chromatin
• Nucleus reforms
• Cytokinesis occurs

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Cytokinesis

• Defined Dividing of the cytoplasm
• In animals Cell pinches inward
• In plants Cell plate begins to separate the two
  new cells

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Cell plate
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Animated Mitosis Clip
Real Mitosis video clip
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Name that Stage!
Anaphase
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Name that Stage!
Telophase
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Name that Stage!
Interphase
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Name that Stage!
Prophase
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Name that Stage!
Anaphase
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Prophase
Metaphase
Interphase
Telophase
Anaphase
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Quick Review

• Mitosis the division of somatic (non-sex) cells
• Each stage has different characteristics
• End Result Two identical diploid cells