Notes
Slide Show
Outline
1
The Cell Cycle
&
 Cell Division
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The Cell Cycle
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Animated Cycle
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MITOSIS
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Mitosis
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Mitosis can be divided into stages
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Interphase
The cell prepares for division
  • Animal Cell
    • DNA replicated
    • Organelles replicated
    • Cell increases in size


  • Plant Cell
    • DNA replicated
    • Organelles replicated
    • Cell increases in size
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Interphase
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Prophase
The cell prepares for nuclear division
  • Animal Cell
    • Packages DNA into chromosomes
  • Plant cell
    • Packages DNA into chromosomes
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Prophase
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Metaphase
The cell prepares chromosomes for division
  • Animal Cell
    • Chromosomes line up at the center of the cell
    • Spindle fibers attach from daughter cells to chromosomes at the centromere



  • Plant Cell
    • Chromosomes line up at the center of the cell
    • Spindle fibers attach from daughter cells to chromosomes at the centromere
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Metaphase
13
Anaphase
The chromosomes divide
  • Animal Cell
    • Spindle fibers pull chromosomes apart
    • ½ of each chromosome (called chromotid) moves to each daughter cell


  • Plant Cell
    • Spindle fibers pull chromosomes apart
    • ½ of each chromosome (called chromotid) moves to each daughter cell

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Anaphase
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Telophase
The cytoplasm divides
  • Animal Cell
    • DNA spreads out
    • 2 nuclei form
    • Cell wall pinches in to form the 2 new daughter cells
  • Plant Cell
    • DNA spreads out
    • 2 nuclei form
    • New cell wall forms between to nuclei to form the 2 new daughter cells
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Telophase
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Mitosis Animation
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MEIOSIS
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Meiosis
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Meiosis
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Meiosis
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Meiosis I
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First Division of Meiosis
  • Prophase 1: Each chromosome duplicates and remains closely associated. These are called sister chromatids.


  • Metaphase 1: Chromosomes align at the center of the cell.


  • Anaphase 1: Chromosome pairs separate with sister chromatids remaining together.


  • Telophase 1: Two daughter cells are formed with each daughter containing only one chromosome of the chromosome pair.
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Prophase  I
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Prophase I
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Metaphase I
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Telophase I
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Meiosis
  • Second Division of Meiosis
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Second Division of Meiosis
  • Prophase 2: DNA does not replicate.


  • Metaphase 2: Chromosomes line up at the center of the cell


  • Anaphase 2: Centromeres divide and sister chromatids move separately to each pole.
  • Telophase 2: Cell division is complete.


  • Four haploid daughter cells are formed.
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Prophase II
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Metaphase II
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Telophase II
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Meiosis
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Meiosis Animation
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Differences in Mitosis & Meiosis
  • Mitosis
    • Asexual
    • Cell divides once
    • Two daughter cells
    • Genetic information is identical


  • Meiosis
    • Sexual
    • Cell divides twice
    • Four haploid daughter cells
    • Genetic information is different


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Comparison Animations