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MITOTIC CELL DIVISION
Cell Reproduction Without Sex
Cell Life Cycle
• cell life cycle includes
a period of growth and
preparation for cell
division (blue). This
period is called
Interphase.
• mitosis is the period of
time that the cell
spends reproducing.
Plant Cell Mitosis
• the many stages of the
cell life cycle can be
seen in the image to
the right
• the process of cell
reproduction includes
prophase, metaphase,
anaphase and
telophase
Interphase
• longest phase of life cycle
• G1 – phase of rapid
growth and increase in
protein and cell RNA
• S – synthesis phase when
DNA duplicates
• G2 - phase of organelle
development and growth
in preparation for cell
division
Prophase
• chromosomes appear
• the nucleolus
disappears
• the cell membrane
begins to break down
Very Late Prophase
• nuclear membrane has
disappeared
• chromosomes start to
move to the equator of
the cell
• each chromosome has
two identical
chromatids
Metaphase
• chromosomes align
along the equator of
the cell
• spindles that are
attached to the poles
connect to the
centromeres
Early Anaphase
• chromosomes are
pulled to the poll by
the contraction of the
spindle fibers
• chromatids are
separated at the
centromere
Late Anaphase
• chromosomes begin to
congregate at the poles
• the energy for this
process if provided by
the mitochondria
Early Telophase
• the new cell wall
begins to form to
separate the new cell
• the chromosomes
begin to form a
nucleus
Late Telophase
• the chromosomes start
to uncoil and become
less dense
• two new identical cells
are formed
Mitosis Review
• all four stages of
mitosis can be seen in
this picture.
• note the process by
which the red and blue
chromosomes
separate.
Interactive Mitosis Tutorial
This is an excellent interactive mitosis
animation tutorial for high school biology
students.
http://www.sci.sdsu.edu/multimedia/mitosis/
Credits
• Bruce, Anne; http://www.microscopyuk.org.uk/mag/artaug99/mitosis.html ,
Microscopy UK, August 1999.