A Tour of the Cell
Cycle
With Pookie and
Shnukums
A Tour of the Cell
Cycle
With Pookie and
Shnukums
A Tour of the Cell
Cycle
With Pookie and
Shnukums
A Tour of the Cell
Cycle
With Pookie and
Shnukums
A Tour of the Cell
Cycle
With Pookie and
Shnukums
A Tour of the Cell
Cycle
With Pookie and
Shnukums
A Tour of the Cell
Cycle
With Pookie and
Shnukums
A Tour of the Cell
Cycle
With Pookie and
Shnukums
A Tour of the Cell
Cycle
With Pookie and
Shnukums
A Tour of the Cell
Cycle
With Pookie and
Shnukums
A Tour of the Cell
Cycle
With Pookie and
Shnukums
A Tour of the Cell
Cycle
With Christi and Mollie
Biology
22 September 2003
Overview
• G 1 Phase
• S Phase
• G 2 Phase
• Mitosis
• Meiosis
• Conclusion
• Works Cited
G 1 Phase
What is it?
• The G 1 phase enables the cell to grow and
to produce all the necessary proteins for
DNA synthesis.
Why is it Important?
• Simply, it
prepares the cell
to enter the next
phase.
•With out it,
the cell would
not be able to
function in the
“S” phase.
S Phase
What is it?
• In this phase
the cell
douplicates
it’s DNA,
making two
sets of DNA.
Why is it Important?
• So that when the
cell divides the
two daughter
cells will have
the correct
amount of DNA.
G2 Phase
What is it?
• During the gap between DNA
synthesis and mitosis, the cell
will continue to grow and
produce new proteins. At the
end of this gap there is a control
check point that will determine
if the cell is ready to proceed to
mitosis.
Mitosis
(M phase)
What is it?
• During Mitoses the cell divides
into two identical daughter cells
during prophase, metaphase,
anaphase, telophase, and
cytokinesis.
Prophase
• Prophase is
when the
nucleus fades
and the DNA and
proteins
condense into
chromosomes.
Metaphase
• Tension is
applied by the
spindle fibers
and aligns all
chromosomes
into one line in
the center of the
cell.
Anaphase
• The spindle
fibers shorten
and the
chromatids are
pulled from the
center to the cell
poles.
Telophase
• The two
daughter cells
come to the
poles and the
spindle fibers
that pulled
them apart
disappear.
Cytokenisis
• During
cytokenisis a
contractile ring
cleaves the cell
into two separate
daughter cells.
Meiosis
How Does it Work?
• Meiosis is only used by gamates, or sex cells.
Meiosis is a process to convert a diploid cell
to a haploid gamete, and cause a change in
the genetic information to increase
diversity in the offspring.
Compare Mitosis and
Meiosis
The difference
between Meiosis
and Mitosis is
that Meiosis uses
a male and
female cell to
reproduce.
Mitosis on the
other hand uses
only one cell and
does not need
male and
female.
Conclusion
• G 1 Phase
• S Phase
• G 2 Phase
• Mitosis
• Meiosis
Works Cited
• http://anthro.palomar.edu/synthetic/synth_3.htm
• http://www.cellsalive.com/cell_cycle.htm
• http://www.biology.arizona.edu/cell_bio/tutorials/ce
ll_cycle/main.html
• http://www.geocities.com/CollegePark/Lab/1580/
cycle.html
Hope You
Enjoyed
Your
Visit!