Answer the following
question in your
notebook
What does a cell need to
do before it divides?
Importance of the cell cycle?
So why are chromosomes
important?
Read about the
Eukaryotic Cell
Cycle on page 125
of your textbook
and use the
information to
construct a flow
map showing the
detailed events of
the cell cycle.
Be sure to leave some
space in your flow map
so that we can add
information to it when
we finish
Now, lets read
about the Control
of the Cell Cycle on
pages 126 of your
textbook.
Working with a partner, add
this information to the flow
map you just created.
During the S phase,
the DNA is being
synthesized and replicated
1st growth
phase. During
this phase the cell
is growing and going
through its normal
metabolic processes.
(its doing what it is meant
to do). Muscle cells
relaxing and contracting,
liver cells filtering
etc. . .
Centrioles replicate
and the cell
prepares to divide
Cytokinesis
But What About Mitosis
and Cytokinesis?
Cytokinesis
a process of cell division that forms two new nuclei,
each of which has the same number of chromosomes
Get a copy of
the “Mitosis and
Cytokinesis”
Use the
information on
pages 128 – 132
of our textbook
as well as any
other resources
to complete the
handout.
Prophase
Stage
Description of Stage
First and longest phase of mitosis. The
nuclear envelope dissolves (goes away),
chromatin coils up and condenses to form
visible chromosomes.
Example Drawings
Plant Cell
Animal Cell
Metaphase
Stage
Description of Stage
The short second phase of mitosis. The
doubled chromosomes become attached to the
spindle fibers at their centromeres and move
to the equator of the cell.
Example Drawings
Plant Cell
Animal Cell
Anaphase
Stage
Description of Stage
The 3rd phase of mitosis. During this phase,
the centromeres split and the sister
chromatids are pulled to opposite poles of the
cell by the shortening of the microtubules.
Example Drawings
Plant Cell
Animal Cell
Telophase
Stage
Description of Stage
The final phase of mitosis. Two distinct
daughter cells are formed and the cells begin
to separate. This stage is indicated by the
formation of a cell plate in plant cells and a
cleavage furrow in animal cells.
Example Drawings
Plant Cell
Cell Plate
Animal Cell
Cleavage Furrow
Why is Cytokinesis
important?
Mitosis guarantees genetic continuity. When
mitosis is complete, unicellular organisms
remain as single cells, In multicellular
organisms cell reproduction results in cells
that work together as tissues  tissues work
together to form organs  organs to form
organ systems  and organ systems form
organisms.