1. Unit 3 Cells and Photosynthesis Section 4 Mitosis
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2. Cells and Photosynthesis
Vocabulary
Cells
Mitosis
Meiosis
Animal Cells and Structures
Plant Cells and Structures
Photosynthesis
Cellular Respiration

3. Standards
SC.912.L.16.17 Compare and contrast mitosis and meiosis and relate to the processes of sexual and asexual reproduction and their consequences for genetic variation.
SC.912.L.16.Su.6 Recognize that cells reproduce by dividing.
SC.912.L.16.Pa.6 Recognize that living things produce offspring (reproduce).
SC.912.L.16.14 Describe the cell cycle, including the process of mitosis. Explain the role of mitosis in the formation of new cells and its importance in maintaining chromosome number during asexual reproduction.
SC.912.L.16.In.7 Recognize that cells reproduce by dividing to produce new cells that are identical (mitosis) or new cells that are different (meiosis).

4. Essential Questions/Big Ideas
What is mitosis?
What are the different phases?

5. Cells go through cycles.
Cells need to grow and repair during their lifetime.
Growth
a baby grows into a child that grows into a teenager
Repair
a cut will scab and heal

6. The cycle that helps our cells grow and repair is Mitosis.
During Mitosis one cell divides to make 2 cells. These 2 exact cells are now called daughter cells.
The cycle that helps our cells grow and repair is Mitosis.

7. Learn more about Mitosis…click image to play

8. Mitosis is the process where cells grow or repair.
To grow and repair, cells have to divide and copy

9. Click image to link to book
Read more about mitosis @ Tarheelreader. org
Click image to link to book

10. Mitosis happens in 5 stages (phases)
Interphase
Prophase
Metaphase
Anaphase
Telophase

11. DNA in the cell is copied to prepare for cell division
2 identical sets of chromosomes are made.
Stage 1: Interphase

12. Stage 2: Prophase The chromosomes condense
The chromosomes look like the letter X under a microscope.
They look like an X because they have condensed and they only look like an x because of DNA replication and structure of homologous chromosomes and sister chromatids with a centromere.
Each chromosome is made up of 2 chromatin (exact copies).
The chromosomes pair up
Stage 2: Prophase

13. Prophase continued… The spindles start to reach across the cell
At the end of prophase, the membrane around the nucleus in the cell dissolves
The chromosomes are then released
Prophase continued…

14. The chromosomes line up end-to-end along the center of the cell.
The spindles attach to each of the chromatids
Stage 3: Metaphase

15. Stage 4: Anaphase The chromatids are pulled apart by the spindles.
One chromatid is pulled to one pole and the other chromatid to the other pole.
Stage 4: Anaphase

16. At each pole of the cell a full set of chromosomes gather together.
A membrane forms around each set of chromosomes
The single cell then pinches in the middle to form two separate daughter cells.
Each cell has its’ own set of chromosomes.
This process is known as cytokinesis.
Stage 5: Telophase

17. Mitosis

18. Click on image to play…

19. What have you learned…

20. Mitosis Interactive website

21. Mitosis Metaphase Prophase Telophase Interphase Anaphase
Label the phases (see worksheet)
Mitosis
Metaphase
Prophase
Telophase
Interphase
Anaphase

22. Learn more about mitosis at Floridastandards.org

23. Check what you have learned click start now to begin