1. Cell Division
Mitosis & Meiosis

2. Why is it important to me?
Cell Division
What is it?
Why do Cells do it?
Why is it important to me?

3. Purpose is growth and repair In which cells does mitosis NOT occur?
Cell division AKA Mitosis takes place in regular body cells (somatic cells)
Purpose is growth and repair
In which cells does mitosis NOT occur?
Gametes AKA sex cells!

4. Phases of Mitosis

5. The Basic Phases of a Cell’s Life:
Mitosis
The Basic Phases of a Cell’s Life:
Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis

6. Interphase The longest stage of a Cell’s life
The time spent between divisions
Produces all materials required for growth
Preparation for division

7. Part of Interphase is also known as the G1 Phase of the Cell Cycle
(Growth Phase)

8. The Second part of Interphase is known as the S Phase of the Cell Cycle
(Synthesis Phase – when DNA duplicates)

9. Chromosome Structure

10. The third part of the Cell Cycle, G2, is just a checkpoint to make sure the DNA is correct.
Next step –
Mitosis

11. Mitosis: Cell Division
The last part of the Cell Cycle is called Mitosis and has 4 phases during which the cell divides into 2 cells

12. The Cell begins the division process
Prophase
The Cell begins the division process
The nucleolus disappears,
The nuclear membrane breaks apart

13. 3. The chromosomes
become visible
4. The spindle
apparatus forms
and attaches to
the centromeres
of the
chromosomes

14. The Second Phase of Mitosis
Metaphase
The Second Phase of Mitosis
The Nuclear Membrane is completely gone
2. The duplicated chromosomes line up along the cell's equator.

16. Anaphase The third phase of Mitosis
Diploid sets of daughter chromosomes separate
They are pushed and pulled toward opposite poles of the cell by the spindle fibers

17. Spindle Fibers

18. Telophase The nuclear membrane and nucleoli (nucleus) reform.
Cytokinesis is nearly complete,

19. The Cell Plate begins to form
The Cell prepares for finial division

20. Cytokinesis – The final stage of Mitosis
The cytoplasm, organelles, and nuclear material are evenly split and two new cells are formed.
Cell Plate

21. The two new cells – each exactly like the other – are called Daughter Cells

22. Quick Review – Place Cells in Mitosis Order
A B C
D E

23. Interphase
Quick Review: Identify What happens in each phase of Mitosis:
Prophase
Metaphase
Anaphase
Telophase