Mitosis

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Mitosis
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Cellular Division

• Binary fission - cell division in which one cell
  splits into two
• Mitosis - cell division involving duplication
  and separation of the chromosomes
• Meiosis - cell division that reduces the number
  of chromosomes in a cell by half
• Interphase occurs before mitosis. During
  interphase, chromosomes are copied.

3
Stages of Mitosis

• Prophase chromosomes condense into rod-like
  structures
• Metaphase chromosomes line-up along the equator
• Anaphase chromatids separate and move to opposite
  sides of the cell
• Telophase a nuclear membrane forms around each
  set of chromosomes and mitosis is complete

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Stages of Mitosis
Prophase
Anaphase
Interphase
Metaphase
Telophase
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• After mitosis, cytokinesis takes place.
• In cells that lack a cell wall, the cell pinches
  in two.
• In cells that have a cell wall, a cell plate
  forms between the two new cells.

6
Meiosis

• Only eukaryotic cells can undergo meiosis.
• When a cell undergoes meiosis, a form of cell
  division occurs that produces daughter cells with
  half of the species' usual number of chromosomes,
  or haploid cells.
• These resulting daughter cells are gametes and
  aid the organism in sexual reproduction.

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Assignments

• Make a circle map using the following words
  binary fusion, mitosis, meiosis
• Make a tree map with the stages of mitosis,
  listing the definition and picture for each stage
• Make index cards with each of the stages of
  mitosis (do NOT label them)
• Yarn activity with mitosis
• Write the lyrics to Mitosis 4 stages

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Test timeAre you ready?

• Know the definition for binary fusion, mitosis,
  and meiosis.
• Be able to draw, color and label the stages of
  mitosis.