Download The CELL CYCLE

AND MITOSIS!
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Longest stage in the
cell cycle
The stage in which
cells carry out the
functions necessary
for survival:
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Growth and
preparation
DNA replication
Continued growth
and replication
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Usually the shortest stage
The stage in which the contents of the cell’s
nucleus divides into two equal parts
The phases of mitosis:
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Prophase
Metaphase
Anaphase
Telophase
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Chromosomes
condense
Spindle fibres form
Chromosomes attach
to the spindle fibres
at their centromeres
Nucleolus and
nuclear membrane
disappear
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Spindle fibres pull
the X-shaped
chromosomes into a
single line across the
middle of the cell
(equator)
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Spindle fibres begin
to contract and
shorten
Centromere pulls
apart
Chromosomes move
to opposite poles of
the cell
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One complete set of
chromosomes is at
each pole of the cell
Spindle fibres begin
to disappear
Nuclear membrane
and nucleolus forms
in each cell
Cell is ready to
divide
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Seperates the two nuclei and cell contents into
two daughter cells.
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Cells will not
divide:
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Not enough
nutrients
DNA has not
replicated
DNA is damaged
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If a mutation occurs in the checkpoint protein
gene, cell cycle control will be lost. A damaged
cell may divide uncontrollably.
Cancer is the result of uncontrolled cell growth.
How cancer grows