Download - Mitosis.ppt
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-genetic material (blueprints)
• Long strands:
Chromatin
(spaghetti)
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• CHROMOSOMES: Condensed strands,macaroni
• CHROMATIDS:Duplicated Chromosomes, double macaroni
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MITOSIS Division of the cell to make
new cells. Three stages of cell division:
Interphase- whole cell
Mitosis- nucleus only (4 steps)
Cytokinesis-whole cell
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INTERPHASE Whole cell-organelles 2x,
DNA replicates,
prep.
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Most of the cell’s life is spent in interphase.
INTERPHASE
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MITOSIS4 PHASES/STEPSNUCLEUS ONLY
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PROPHASE• Nuclear
membrane disappears.
• Centrioles move to opposite sides of cell.
• Chromosomes 2x.
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PROPHASE
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PROPHASE
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METAPHASE• Chromatids
attach to
spindle fibers
and line up in
center of cell.
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METAPHASE
MILITARY LINE-UP
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METAPHASE
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ANAPHASE• Chromatids
go to
opposite
sides of
the cell.
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ANAPHASE
AWAY
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ANAPHASE
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TELOPHASE• New nuclear
membrane
surrounds
Chromosomes,
which return
to chromatin.
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TELOPHASE
TWO NUCLEI
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TELOPHASE
SAME TIME AS CYTOKINESIS
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CYTOKINESIS• Whole cell• Same time as Telophase
• Chromatin again
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CYTOKINESISDifference
between
P & A: Animal pinches in
&…..
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CYTOKINESISDifference
between
P & A:
Plant has cell plate moving out.
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CYTOKINESIS
2 CELLS
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WHOLE PROCESS:
CREATION OF 2 NEW IDENTICAL CELLS