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  1. Get 3 half sheets of paper (see clipboard on paper cutter on back table).

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3) Fold the top over until you are about ½ an inch from the first edge. You should now have 6 edges in view. (see photo)

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2) Stack them on top of each other so that they are overlapping.

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4) Label each edge in the following order from top to bottom:

    • Prophase (Early)
    • Prophase (Late)
    • Metaphase
    • Anaphase
    • Telophase (Early)
    • Telophase (Late)

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5) Write out description of each phase on the front (above the name of the phase): Use the following slideshow for these.

6) On the back, draw a picture of the phase and color.

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Coloring: Use at least 4 different colors for each drawing. Use the same colors for each cell part in each drawing. Identify a color for centrioles, spindle fibers, nucleus/chromosome and cell membrane. Use the same color for the same organelle for the entire foldable.

7) Staple foldable on top right edge and left edge.

8) Tape into notebook when finished. Show me for credit.

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Early Prophase

Prophase is the longest stage of mitosis. It can be broken into 2 steps: early prophase & late prophase.

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  • During early prophase, centrioles move apart towards the poles forming spindle fibers.
  • Chromosomes condense and become visible.
  • Nucleus starts to break apart.

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Early Prophase

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centrioles

Spindle fibers

Nucleus with chromosomes

Cell membrane

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Late Prophase

  • Centrioles are now at the poles.
  • Spindle fibers have attached to the centromeres of chromosomes
  • Spindle fibers begin moving chromosomes towards the center.
  • Nucleus is gone.

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Late Prophase

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Metaphase

  • Shortest stage of mitosis.
  • Spindle fibers move the chromosomes to the center (middle) of the cell.

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Metaphase

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Anaphase

  • Chromosomes break at the centromere. Spindle fibers move the chromatids (apart) to form two groups near the poles.

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Anaphase

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Early Telophase

Many events occur during telophase. This phase can also be broken into 2 parts: early telophase & late telophase

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  • The condensed chromosomes at the poles start to relax.
  • Spindle fibers disappear
  • Cytokinesis begins at cleavage furrow.

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***Cytokinesis: pinching of the cytoplasm in animal cells at the cleavage furrow.

***Cleavage furrow: site of cytokinesis

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Early Telophase

Cytokinesis at the cleavage furrow

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Late Telophase

  • A new nuclear envelope forms around chromatin.
  • Spindle fibers completely gone.
  • Cytokinesis finishes and creates two identical daughter cells

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Now that you are done, press the backspace until the first slide is being displayed.

Tape your foldable into your notebook and then show me for credit.

New nuclear envelope encasing chromatin

New nuclear envelope encasing chromatin