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!