How do baby animals grow to
be adults?
Why do animals shed their skin?
Cells divide for three purposes:
• Organisms grow because
cell division increases the
total number of cells.
• Each day, cells in your body
wear out or become
damaged and need to be
replaced.
• Asexual reproduction
The Cell Cycle - Mitosis
A cell grows, prepares for division,
and then divides into two new cells.
These two new cells, called daughter
cells, are identical to the parent cell
because they have the same DNA as
the parent cell.
3 stages of the Cell Cycle:
• Interphase
• Mitosis
–Prophase
–Metaphase
–Anaphase
–Telophase
• Cytokinesis
Interphase
•
•
•
•
Cell spends most of its life in this phase
The cell grows to its full size
DNA is copied in the nucleus of the cell
Cell prepares to divide
Interphase
Prophase
• 1st and longest phase
of Mitosis
• Chromosomes
become visible
• Centrioles separate
and move to opposite
ends of cell
• Spindle fibers appear
• Nuclear membrane
disappears
Prophase
Metaphase
• 2nd and shortest phase of Mitosis
• Chromosomes attach to spindle fibers in
center of cell
Metaphase
Anaphase
• 3rd phase of
Mitosis
• Centromeres
split apart and
chromatids
separate from
each other.
• Chromosomes
move to opposite
poles
Anaphase
Telophase
• 4th and last phase of
Mitosis
• Chromosomes reach
opposite poles of cell
• Chromatids unwind
back into chromatin
• Nuclear membranes
begins to form around
the chromatin at each
end
• Spindle fibers
disappear
Telophase
Cytokinesis
• New cell membrane forms between two
nuclei.
• The cell splits into two new cells – each
with identical chromosomes.
Cytokinesis
Mitosis Review
Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
REMEMBER!
Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
IPMATC
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