1. Vocabulary
Prophase
Metaphase
Anaphase
Telophase

2. The Cell Cycle
Notes

4. Interphase The cell is growing and preparing to divide.
The cell spends most of its life in interphase.
There are three parts of interphase:

5. Interphase
G1 (Growth/Gap) - the cell doubles in size and the number of organelles doubles.
S (synthesis phase) – the DNA replicates.
G2 (Growth/Gap) – cell prepares for division

6. NOW THE CELL IS READY TO BEGIN MITOSIS

7. MITOSIS
A set of procedures that makes two identical cells (called daughter cells)
There are four phases of mitosis:
Prophase
Metaphase
Anaphase
Telophase

8. Mitosis
Prophase
Anaphase
Telophase
Metaphase

9. Prophase

10. Prophase Chromosomes appear as the chromatin condenses.
The nuclear membrane and the nucleolus breakdown.
In animal cells, centrioles appear.

11. Prophase Spindle fibers begin to appear at the poles of the cell.
The spindle fibers attach to the centromeres (the middle of the chromosomes).

12. Prophase

13. Metaphase

14. Metaphase
The chromosomes move to the middle (equator) of the cell.

15. Anaphase

16. Anaphase
Chromosomes are pulled back to the poles by the spindle fibers and are split into chromatids

17. Telophase

18. Telophase Spindle fibers and centrioles disappear
Nuclear membrane and nucleolus reforms
The chromatids uncoil back into chromatin

19. Telophase

20. Cytokinesis Occurs after mitosis
The cytoplasm splits into 2 cells and the organelles are separated into the cells
Plant cells: a new cell wall forms around the cells to complete cell division.

21. Cytokinesis
Two identical cells are formed

22. The cycle repeats itself.
-Interphase -Anaphase
-Prophase -Telophase
-Metaphase -Cytokinesis

23. Cell Cycle Microviewers
Use the microviewers to work through the Microviewer Lab.
Answer all questions!