1. Cell Theory & Cell Division

2. 1. All living things are made of cells
Cell Theory
1. All living things are made of cells

3. Which of the following is made of cells?
Rock
Bacteria
Fish
Skin
Glass
Eyelashes
Question 2:
Which of these are made of atoms?

4. (they contain different parts with their own jobs)
Cell Theory
2. Cells have structure
(they contain different parts with their own jobs)

5. 3. All cells come from other cells
Cell Theory
3. All cells come from other cells

6. 4. Cells contain DNA or genetic information
Cell Theory
4. Cells contain DNA or genetic information

7. 2 Types of Cells 1. Eukaryotic = Has a Nucleus
2. Prokaryotic = Has NO Nucleus

8. To help you remember…
Pro = NO!
Eu = YES!

9. How do Cells Divide?

10. Mitosis
The process by which a nucleus divides into 2 identical “daughter” cells, each containing the same number & type of chromosomes as the parent cell

11. Mitosis Videos Cell Cycle & Cancer : http://youtu.be/lpAa4TWjHQ4
As you watch:
Why is it important for your cells to divide?
What are the 4 main parts of Mitosis?

12. Why is it important for cells to divide?
Helps you grow
Helps heal wounds
Replaces old, worn out cells

15. Before a cell divides… Interphase 90% of cell life
Cell is working, doing its job
Towards the end, begins to make a copy of its DNA

17. Steps of Mitosis: PMAT 1. Prophase P = Prepare
Cell makes a copy of DNA
DNA condenses into chromosomes

18. Steps of Mitosis: PMAT 2. Metaphase M = Middle Nucleus “dissolves”
Chromosomes line up in the
middle of the cell

19. Steps of Mitosis: PMAT 3. Anaphase A = Away Chromosomes are
pulled apart

20. Steps of Mitosis: PMAT 4. Telophase T = Two Twins
Splits into two identical
nuclei and cells

21. Identify the Steps of Mitosis
A) B)
Identify the Steps of Mitosis
C) D)

22. B A D C

23. Meiosis
The division of a parent cell twice to create four different daughter cells. They have half the number of chromosomes as the parent.

24. Meiosis- division of sex cells
It is what makes you male or female
PMAT x 2 then cytokenesis

25. Steps of Meiosis

26. Mitosis Meiosis One division Same number of Chromosomes
Identical to Parent genetically
2 daughter cell produced
Body Cells
Two divisions
Half number of chromosomes
Different from parent genetically
4 daughter cells produced
Sex cells (Gametes)

27. Mitosis/Meiosis
You will draw and label each circle with the number of chromosomes shown in the circles below

28. Phases of Mitosis Phases of Meiosis
Draw the phases:
Prophase
Metaphase
Anaphase
Telophase
Draw the phases:
Meiosis I: Meiosis II:
Prophase I Prophase II
Metaphase I Metaphase II
Anaphase I Anaphase II
Telophase I Telophase II

29. Binary Fission (watch video after you finish, link is on the last slide)
The simple cell division in which one cell splits into two
Allows for rapid reproduction
Used by bacteria

30. Video clip
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