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Catalyst 1.What structure in the cell is made up of condensed chromatin? 2.During what stage of...

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Interphase Longest phase of the cell cycle – 90% of a cell’s life spent here Has 3 stages: – G1 – S – G2
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Catalyst 1.What structure in the cell is made up of condensed chromatin? 2.During what stage of interphase is DNA duplicated? 3.What are the two things found inside the nucleus? 4.When we are talking about mitosis, what kind of cells are we talking about?
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Page 1: Catalyst 1.What structure in the cell is made up of condensed chromatin? 2.During what stage of interphase is DNA duplicated? 3.What are the two things.

Catalyst

1. What structure in the cell is made up of condensed chromatin?

2. During what stage of interphase is DNA duplicated?

3. What are the two things found inside the nucleus?

4. When we are talking about mitosis, what kind of cells are we talking about?

Page 2: Catalyst 1.What structure in the cell is made up of condensed chromatin? 2.During what stage of interphase is DNA duplicated? 3.What are the two things.

Mitosis and the Cell Cycle

Ms. KlinkhachornFebruary 17, 2010

Page 3: Catalyst 1.What structure in the cell is made up of condensed chromatin? 2.During what stage of interphase is DNA duplicated? 3.What are the two things.

Interphase

• Longest phase of the cell cycle– 90% of a cell’s life spent here

• Has 3 stages:– G1– S– G2

Page 4: Catalyst 1.What structure in the cell is made up of condensed chromatin? 2.During what stage of interphase is DNA duplicated? 3.What are the two things.

Mitotic Phase

• Occurs after interphase• Mitosis has 4 stages:– Prophase– Metaphase– Anaphase– Telophase

• Cytokinesis

Page 5: Catalyst 1.What structure in the cell is made up of condensed chromatin? 2.During what stage of interphase is DNA duplicated? 3.What are the two things.
Page 6: Catalyst 1.What structure in the cell is made up of condensed chromatin? 2.During what stage of interphase is DNA duplicated? 3.What are the two things.

Interphase

Page 7: Catalyst 1.What structure in the cell is made up of condensed chromatin? 2.During what stage of interphase is DNA duplicated? 3.What are the two things.
Page 8: Catalyst 1.What structure in the cell is made up of condensed chromatin? 2.During what stage of interphase is DNA duplicated? 3.What are the two things.
Page 9: Catalyst 1.What structure in the cell is made up of condensed chromatin? 2.During what stage of interphase is DNA duplicated? 3.What are the two things.

Prophase

Page 10: Catalyst 1.What structure in the cell is made up of condensed chromatin? 2.During what stage of interphase is DNA duplicated? 3.What are the two things.

Prophase

• Nucleus starts to break down• Nucleolus disappears• Chromosomes formed from chromatin• Spindles start to grow and separate

Page 11: Catalyst 1.What structure in the cell is made up of condensed chromatin? 2.During what stage of interphase is DNA duplicated? 3.What are the two things.
Page 12: Catalyst 1.What structure in the cell is made up of condensed chromatin? 2.During what stage of interphase is DNA duplicated? 3.What are the two things.
Page 13: Catalyst 1.What structure in the cell is made up of condensed chromatin? 2.During what stage of interphase is DNA duplicated? 3.What are the two things.

Metaphase

Page 14: Catalyst 1.What structure in the cell is made up of condensed chromatin? 2.During what stage of interphase is DNA duplicated? 3.What are the two things.

Metaphase

• Spindles located at opposite ends of the cell – Spindle fully grown

• Chromosomes line up across the middle of the cell

• Spindle fibers (microtubules) attach to chromosomes at the centromere

Page 15: Catalyst 1.What structure in the cell is made up of condensed chromatin? 2.During what stage of interphase is DNA duplicated? 3.What are the two things.
Page 16: Catalyst 1.What structure in the cell is made up of condensed chromatin? 2.During what stage of interphase is DNA duplicated? 3.What are the two things.
Page 17: Catalyst 1.What structure in the cell is made up of condensed chromatin? 2.During what stage of interphase is DNA duplicated? 3.What are the two things.

Anaphase

Page 18: Catalyst 1.What structure in the cell is made up of condensed chromatin? 2.During what stage of interphase is DNA duplicated? 3.What are the two things.

Anaphase

• Microtubules attached to chromosomes shrink– Causes the sister chromatids to separate

• Microtubules not attached to chromosomes get longer– Causes the cell to stretch apart more

Page 19: Catalyst 1.What structure in the cell is made up of condensed chromatin? 2.During what stage of interphase is DNA duplicated? 3.What are the two things.
Page 20: Catalyst 1.What structure in the cell is made up of condensed chromatin? 2.During what stage of interphase is DNA duplicated? 3.What are the two things.
Page 21: Catalyst 1.What structure in the cell is made up of condensed chromatin? 2.During what stage of interphase is DNA duplicated? 3.What are the two things.

Telophase and Cytokinesis

Page 22: Catalyst 1.What structure in the cell is made up of condensed chromatin? 2.During what stage of interphase is DNA duplicated? 3.What are the two things.

Telophase and Cytokinesis

• Telophase– Nucleus and nucleolus reform– Chromosomes fall apart (into chromatin strands)– Spindle disappears

• Cytokinesis– This is NOT a part of mitosis, but starts during

telophase– Division of the cytoplasm

• Cells pinch inwards to form two daughter cells

Page 23: Catalyst 1.What structure in the cell is made up of condensed chromatin? 2.During what stage of interphase is DNA duplicated? 3.What are the two things.
Page 24: Catalyst 1.What structure in the cell is made up of condensed chromatin? 2.During what stage of interphase is DNA duplicated? 3.What are the two things.
Page 25: Catalyst 1.What structure in the cell is made up of condensed chromatin? 2.During what stage of interphase is DNA duplicated? 3.What are the two things.

End Results of Mitosis – Daughter Cells

Page 26: Catalyst 1.What structure in the cell is made up of condensed chromatin? 2.During what stage of interphase is DNA duplicated? 3.What are the two things.
Page 27: Catalyst 1.What structure in the cell is made up of condensed chromatin? 2.During what stage of interphase is DNA duplicated? 3.What are the two things.

Exit Slip

1. List the phases of mitosis in order.2. What is cytokinesis?3. Name the phase when..

• The nucleus reappears• The chromosomes move to opposite ends of the cells• The nucleolus disappears• The spindle fibers shorten and lengthen for movement• The chromosomes line up in the middle of the cell

Page 28: Catalyst 1.What structure in the cell is made up of condensed chromatin? 2.During what stage of interphase is DNA duplicated? 3.What are the two things.

Mitosis animations

• http://www.cellsalive.com/mitosis.htm• http://highered.mcgraw-hill.com/sites/00730

31216/student_view0/exercise13/mitosis_movie.html

• http://highered.mcgraw-hill.com/sites/0072437316/student_view0/chapter11/animations.html#


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