The%20Cell%20Cycle%20and%20Mitosis

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The Cell Cycle and Mitosis
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By the end of today you will be able to

• Name and describe the main events of the cell
  cycle.

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The Cell Cycle

• The events of a cells life
• Growth and metabolism
• Cell division

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The Cell Cycle is divided into two parts

• Interphase (when growth and metabolism takes
  place)
• M phase (when mitosis and cell division occurs)

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Interphase

• Mostly engaged in normal cell metabolism
• But also getting ready for cell division
• --The cell grows
• --DNA replicates
• --Other organelles duplicate

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Most of the cell cycle is Interphase
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Mitosis

• Prophase
• Metaphase
• Anaphase
• Telophase

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What happens to DNA in mitosis?
Chromatin condenses in chromosomes at the
beginning of prophase (Chromatin is the complex
of DNA and associated proteins found in the
nucleus)

• Chromatin

• Chromosomes

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Chromosome Replication

• Chromosomes are replicated to form identical
  copies of themselves.
• Two identical copies of a chromosome are called
  sister chromatids
• Centromere - area where the chromatids of a
  chromosome are attached

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Cytokinesis
-Cytoplasmic division and formation of two
identical daughter cells
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Checkpoint

• 1. The break down of a cells entire life is the
  _______ ________.
• 2. The phase of the cell cycle when the cell is
  growing, replicating DNA and getting ready for
  mitosis is _____________.
• 3-6. What are the four phases of Mitosis?
• 7. The process of a cell actually splitting in
  two is called _______________.

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• http//highered.mcgraw-hill.com/olc/dl/120073/bio1
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