the cell cycle - kyrene.org · cell division classification stage name process 1 cell doubles in...
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THE CELL CYCLE
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The Cell Cycle
Cell Division & Mitosis. Retrieved March 6, 2007, from Biology 4A
Student Resources Web site:
http://www.biologycorner.com/bio4/notes/mitosis.php
Cell division
occurs in
three stages:
interphase,
mitosis, and
cytokinesis.
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Cell Division Classification
Stage Name Process
Cell doubles in size; DNA is copied1
6
2
3
5
4
Interphase
Mitosis
Cytokinesis
Prophase
Metaphase
Anaphase
Telophase
The process of the cell’s nucleus
dividing during prophase-telophase
Mitosis begins; nuclear membrane
disappears
Chromosomes line up along the
equator of the cell
Chromatids split and are pulled to
each pole of cell
Nuclear membrane reforms; cell
begins to pinch together. Mitosis ends
Parent cell’s cytoplasm divides,
forming 2 identical daughter cells
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Stage 1: Interphase1. The cell doubles in
size
2. DNA Replicates
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Chromatin
Nuclear
Membrane
Interphase
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Mitosis
Mitosis is subdivided into four phases.
Cell Division & Mitosis. Retrieved March 6, 2007, from Biology 4A Student Resources Web site:
http://www.biologycorner.com/bio4/notes/mitosis.php
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Prophase1. Mitosis begins (cell begins to
divide).
2. Centrioles appear
3. Spindle fibers form between
the centrioles.
4. Chromatin coils up into
Chromosomes
***Each chromosome consists of
two sister chromatids attached
together by a centromere by the
end of this stage.
-chromatid = half of a copied chromosome
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Prophase
CentriolesSpindle fibers
Nuclear Membrane
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Metaphase1. Nuclear membrane has
disappeared.
2. Chromosomes line up
along the equator of the
cell.
3. Spindle fibers attach to
centromeres of each
chromosome.
Spindle fibers
Chromosome
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Anaphase
1. Chromatids split
2. Spindle fibers pull
chromosomes to
opposite ends of the
cell. centrioles
Spindle fibers
Chromosomes
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Telophase1. Two new nuclei form
• nuclear membranes
reform around
chromosomes
2. Chromosomes return to
chromatin form.
3. Mitosis ends.
centriolesSpindle fibers
Nuclei
Chromosome
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Cytokinesis
1. Cell membrane
pinches and forms
identical daughter cells
After cytokinesis,
interphase begins,
starting the cell
cycle again.
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Mitosis Animations
1. Basic mitosis animation.
2. Cells Alive
3. Simple Animal Cell
4. The Biology Project(Use the QuickTime version @ bottom of site.)
5. Cell Division Bio-Clip (This is the best one!)
6. Mitosis Animation & Quiz (Self-paced)
7. Narrated animation & quiz (Self-paced)
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Ok, now let’s review
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Draw interphase.
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What phase is this?
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Draw cytokinesis.
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What phase is this?