1. How do your cells divide?
Mitosis
How do your cells divide?
This PowerPoint has many animated slide progressions. You may only want to print the following slides: 1-11, 14-15, 22-47

2. A few words before we start…..
Haploid:
1 set of
chromosomes
(23 total)
Diploid:
2 sets of
(46 total)
Haploid – number of chromosomes in sex cells represented by n indicating one chromosome
Diploid - number of chromosomes in somatic cells represented by 2n indicating a set or double number of chromosomes

3. Why Do Cells Divide? Surface area Damaged cells Gametes
Answers are animated so you can ask students the question before you reveal the answers
Maintain workable surface area to volume - too big-can’t work!!
Replace damaged cells
Produce sex cells
Gametes

4. Cell Reproduction
is either sexual or asexual

5. Asexual Reproduction (one parent)
Binary Fission-
Budding
Vegetative Propagation
Regeneration
Binary Fission - split in two (bacteria)
Budding- (Yeast)
Vegetative Propagation - (Plants)
Regeneration -

6. Advantages of Asexual Reproduction
Speed
Replacement
Rapid production of offspring (bacteria)
Replacement of lost body parts
Desirable characteristics are continually passed on
Desirable Characteristics

7. DNA Replication Before a cell can divide the DNA must replicate
(make a copy of itself)

8. DNA Replication
Voila!
Two identical
strands of DNA! T C A G

9. Now that DNA has replicated, we are ready to begin Mitosis (nucleus
of the cell divides)
Remind students Mitosis is an asexual cellular reproduction T C A G T C A G

10. Cytokinesis Cell divides. Plant Cell Animal Cell
Cytokinesis almost always follows mitosis. This is what creates two separate cells. Ask students what would happen if you have mitosis without cytokinesis (one cell with two nuclei).
Animal Cell
Plant Cell

11. Mitosis Animation
This animation is a review of mitosis. Have students review what is happening to the chromosomes.
Animation from

12. Overview of the Cell Cycle

13. It’s all about the chromosomes!
There are 46 in human body cells
The number of chromosomes remain constant during Mitosis
Very important to emphasize that the number of chromosomes during mitosis remain constant.

14. Which Cells Go Through Mitosis?
The cells are called autosomes
Cells which help the body in:
Growth
Repair
Explain the reason the chromosome number remains the same is because Mitosis is producing somatic cells (Skin, hair, muscle, etc.)
Work

15. What happens if cell division gets out of control?
CANCER
The body doesn’t respond normally to the body’s control mechanisms

16. Bone Cancer X-ray
Ovarian Cancer Cell Dividing

17. Skin Cancer

18. Mitosis Review 1. Does the beginning cell have 23 or 46 chromosomes?
2. Do the new cells have 23 or chromosomes?
Questions are animated so you can ask each question and get an answer before going to the next question.

19. More Mitosis Review 3. How many daughter cells are produced?
4. Are the resulting daughter cells different from the parent cell?

20. More Mitosis Review
5. Are the resulting daughter cells different from each other?
Questions are animated so you can ask each question and get an answer before going to the next question.