Mitosis with Yarn! Mr. Levine Stages of Mitosis to Model - - PowerPoint PPT Presentation

mitosis with yarn
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Mitosis with Yarn! Mr. Levine Stages of Mitosis to Model - - PowerPoint PPT Presentation

Mitosis with Yarn! Mr. Levine Stages of Mitosis to Model Interphase (Growth + Synthesis) Prophase Metaphase Anaphase Telophase Cytokinesis Mnemonics (memory tricks)? I nteresting P eople M ake A T errific C


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SLIDE 1

Mitosis with Yarn!

  • Mr. Levine
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SLIDE 2

Stages of Mitosis to Model

  • Interphase (Growth + Synthesis)
  • Prophase
  • Metaphase
  • Anaphase
  • Telophase
  • Cytokinesis
  • Mnemonics (memory tricks)?

– Interesting People Make A Terrific Conversation – I Propose Men Are Toads (C) – It Probably Means Another Test (C)

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SLIDE 3

Cell has grown, ready to divide!

  • Hanging in the nucleus are copies of each chromosome
  • Goal: make two cells with complete chromosome sets
  • What needs to happens first?
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SLIDE 4

Interphase - Synthesis

  • DNA gets copied

NEXT?

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SLIDE 5

Prophase

  • Nuclear membrane dissolves
  • DNA condenses
  • Centrioles/Spindles form (from cytoskeleton)

NEXT?

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SLIDE 6

Metaphase

  • Chromosomes, organized by centrioles

and spindle fibers, line up on metaphase plate

NEXT?

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SLIDE 7

Anaphase

  • Chromatids separate and are pulled to
  • pposite ends of cell by centrioles/spindles

NEXT?

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SLIDE 8

Telophase

  • Chromosomes spread back out
  • Nuclear envelopes reappear
  • Centrioles/Spindles disappear (back to cytoskeleton)

Final step?

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SLIDE 9

Cytokinesis - Animals

  • Cleavage furrow forms, cells separate
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SLIDE 10

Cytokinesis - Plants

  • Cell plate forms between daughter cells
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SLIDE 11

Now it’s your turn!

  • Yarn in packets

– Short Red (2x) – chromosomes (6 cm) – Long Red (2x) – chromosomes (12 cm) – Short Blue (2x) – chromosomes (6 cm) – Long Blue (2x) – chromosomes (12 cm) – Green (8x) – Spindle Fibers (40 cm) – Purple (2x) – Nuclear Membranes (50 cm) – Yellow (1x) – Cell Membrane (200 cm)

  • Points

– Diagram to hand in – Quiz Stamp… what’s this?

Please don’t tie pieces together!

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SLIDE 12

Cell Set Up

  • Cell Membrane = Yellow yarn
  • Nuclear membrane = Purple yarn
  • Spindle Fibers = Green yarn
  • Chromosomes = Red & Blue yarn

– Drop one of each chromosome into nucleus so they are curled up and overlapping. Your cell is ready to divide!