1. Cell Cycle and Mitosis

2. Key Concepts and Vocabulary
What is the cell cycle?
What happens in interphase?
What are the stages of mitosis?
How does mitosis differ in plants and animals?
Key Vocabulary:
Interphase
Mitosis
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis

3. The Cell Cycle The phases in the life a cell Two major phases:
Interphase
Cell Division

4. Interphase is the… Period between cell divisions
Longest phase of the cell cycle
What happens during interphase?

5. Phases of Interphase
G1 – “Growth” – proteins made to prepare for replication
S – DNA REPLICATED “synthesis”
G2 – “Getting Ready” for Cell division

6. Mitosis
Division of the cell nucleus that produces two genetically identical cells
Helps create new diploid body cells
How many chromosomes do diploid cells have in humans?
What kind of cells go through mitosis?

7. Mitosis
Mitosis consists of 4 phases: 1. 2. 3. 4.

8. In Prophase Chromosomes form Nucleus begins to disappear
In animal cells, centrioles form

9. In Metaphase Chromosomes line up in the center of the cell
Chromosomes attached to the spindle fibers

10. In Anaphase
Chromosomes (sister chromatids) are pulled apart to each end of the cell by the spindle fibers

11. In Telophase Chromosomes reach the ends of the cell
Two nuclei begin to form around each set of chromosomes
The cells begin to pinch in half

12. In Cytokinesis Cytoplasm of the dividing cell is separated
Ends the process of cell division
Results in two separate cells

13. Cytokinesis in Plants
Plant cells can not pinch in to form a cleavage furrow – why?
Plant cells form a
cell plate to separate new cells

14. Cytokinesis in Animals in Plants

15. Find and Label the Stages of Mitosis

16. Find and Label the Stages of Mitosis

17. Abnormal Cell Division
Cell division is regulated by the cells’ genes
If mutations occur, uncontrolled cell division occurs – forming a tumor
Cancer is caused by the formation of malignant tumors
Malignant tumors spread in the body causing damage