1. The Cell Cycle

2. Steps in the cell cycle
Interphase: No division occurs. Interphase has three subdivisions: G1 S G2

3. Interphase G1: Gap one first phase,
Growth and normal processes take place.
No division occurs
Longest phase of interphase

4. Interphase S or Synthesis phase: Second stage DNA replicates
making another copy of chromosomes.
At the end of this phase, the nucleus will contain two complete sets of DNA. 

5. Interphase G2: Cells prepare for division.
Shortest stage of interphase
Spindle fibers, centrioles, etc - are prepared for next stage

6. Interphase

7. Mitosis
Mitosis: the division of the cell nucleus and its contents. Mitosis has four main stages:
Prophase
Metaphase
Anaphase
Telophase

8. Parent cell
Mitosis
Cytokinesis
Daughter cells

9. Mitosis
Prophase: Chromosomes become shorter, thicker, and become visible.
Nuclear envelope begins to disappear.
Centrioles are moving toward poles and spindle fibers are forming.
Spindle fibers form between centrioles.

10. Prophase

11. Mitosis
Metaphase: The chromosomes line up in the mid-plane of the cell.
Spindle fibers attach to the centromere of the chromosome.

12. Mitosis
Anaphase: Sister chromatids separate at centromeres and move away
One group of chromosomes are pulled by the centrioles on the spindle fibers

13. Anaphase

14. Mitosis
Telophase:
Chromosomes are at the poles.
The nuclear envelopes begin to form.
Nucleolus reforms
Spindle fibers disappear
Cytokinesis and telophase take place around the same time.

15. Telophase

16. Cytokinesis Cytokinesis: The process that divides the cytoplasm.
Animal cells - The cell membrane pinches together

17. Plant Cells
In plant cells cytokinesis occurs by forming a cell plate to form the new cell wall.

18. Answer the following questions
Is this an animal or a plant?
2. What phase is this slide in?
3. What helped you determine which phase this slide was in?

19. Answer the following Is this an animal or a plant?
What phase is this slide in?
6. What helped you determine which phase this slide was in?

20. Answer the following Is this an animal or a plant?
What phase is this slide in?
9. What helped you determine which phase this slide was in?

21. Answer the following Is this an animal or a plant?
11. What phase is this slide in?
12. What helped you determine which phase this slide was in?

22. Answer the following What phase is the cell the arrow is on in?
What phase is the cell to the left of that cell in?
15. Name the two differences between plant mitosis and animal mitosis.

23. Review Four main stages of the cell cycle: G1- normal growth
Synthesis- DNA is copied
Gap 2- more growth
Mitosis- nuclear division
Prophase- chromosomes are visible, nuclear envelope disappears
Metaphase- chromosomes line in up in mid-plane
Anaphase- chromosomes move away from the mid-plane
Telophase- Chromosomes at poles nuclear envelope forms
Cytokinesis- divides the cytoplasm
Together, these three stages make up interphase.