The Cell Cycle

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The Cell Cycle
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Tennessee State Standards Addressed

• Grade 7
• GLE 0707.1.4 Illustrate how cell division occurs
  in sequential stages to maintain the chromosome
  number of a species.
• SPI 0707.1.4 Sequence a series of diagrams that
  depict chromosome movement during plant cell
  division.

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Interphase
Cytokinesis
Mitosis
Cell Cycle
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stage of the cell cycle
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Interphase

• During Interphase, the cells chromosomes
  duplicate.
• This is the phase that occurs BEFORE mitosis
  begins.
• A period of Growth

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• Mitosis is the part the cell cycle in which the
  NUCLEUS divides
• There are 4 phases of Mitosis
• Prophase
• Metaphase
• Anaphase
• Telophase
• OrPMAT

Mitosis
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Prophase

• Prophase is the FIRST phase of Mitosis
• The nuclear membrane has disappeared
• Chromosomes have condensed and shortened
• Centrioles move to opposite ends of the cell (in
  Animal cells ONLY)
• Plant cells do NOT have Centrioles

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Metaphase

• Metaphase is the Second phase of Mitosis
• Chromatids line up in the MIDDLE of the cell
• Spindle fibers attach to the Centromeres

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Anaphase

• Anaphase is the THIRD phase of Mitosis
• Each pair of chromatids separate, because the
  spindle fibers begin to shorten
• The separated chromatids are now called
  chromosomes

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Telophase

• Telophase is the LAST phase of Mitosis
• TWO NEW NUCLEI form, but the two new cells are
  still connected
• Spindle fibers start to disappear
• In plants, a cell plate forms between the two new
  cells

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Cytokinesis

• Cytokinesis occurs after the last phase of
  Mitosis
• The CYTOPLASM separates and two new cells form
• In plants, new Cell Membranes form from the Cell
  Plate

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Cycle?
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the material
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What is the first phase of Mitosis?
Interphase
Prophase
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During which stage does the Cytoplasm divide?
Telophase
Cytokinesis
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Which of the following is a picture of Anaphase?
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Which structure do Animal Cells have and Plant
Cells do NOT?
Cell Plate
Centrioles
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In which stage of Mitosis do chromatids line up
in the middle of the cell?
Prophase
Metaphase
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Resources
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Resources

• Glencoe Science Tennessee Science Grade 7, 2010
  McGraw-Hill
• http//www.sligotoday.ie/details.php?id14134PHPS
  ESSID1c3cee1d50d35074c69b045b4077b0fa
• med.mui.ac.ir
• phschool.com
• celldynamics.org