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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/cell_cycle/main.html
• http://www.geocities.com/CollegePark/Lab/1580/ cycle.html
Hope You Enjoyed
Your Visit!