1. Warm up – Countdown
3 – What are three differences between photosynthesis & respiration? 2 – What are two similarities between photosynthesis & respiration? 1 – What is the relationship between the two processes?

2. Warm up - Photosynthesis
Identify the missing raw materials and products of photosynthesis: 4. 3. 1. 2.
BrainPop Video - Photosynthesis

3. Cell Division

4. Cell Division Amoeba Sisters – Mitosis video
WHY do cells divide (make more cells)?
To grow
To replace dead cells
To repair damaged cells

5. Human Development
So, the division of cells is how we become multicellular!

6. Cell Division/ Cell Cycle
Asexual reproduction – reproduction involving one (or a) parent cell
Cell division – a type of asexual reproduction where one cell divides and becomes two identical copies of itself.
Mitosis – a special part of cell division where the nucleus of the cell makes a copy of itself and then divides into two new nuclei.

7. The Cell Cycle Foldable:
Tape the blank papers in the format on the next page.
Label each paper.
Draw arrows.
Write notes under each flap (from the PPT).
Illustrate each step on the cover of each flap.

8. The Cell Cycle 1. Interphase 2a. Mitosis: Prophase 3. cytokinesis
Pgs
2d. Mitosis:
Telophase
2b. Mitosis: Metaphase
2c. Mitosis: Anaphase

9. BrainPop video clip: Mitosis

10. 1. Interphase Longest stage Cell grows Chromosomes are copied
Chromatids – the two chromosome copies
Centromere – region where chromatids are held together

11. Chromosomes

12. Mitosis - overview
Mitosis – process of cell division that forms two new nuclei, each of which has the same number of chromosomes.
4 phases:
Prophase
Metaphase
Anaphase
Telophase

13. 2a. Mitosis (Prophase)
Prophase = chromosomes “pair” up with their copy.
Prophase= chromosomes “pair” up with their copy.
Chromosomes twist, coil & condense into an “X” shape
Spindle fibers form
Nuclear membrane begins to break down

14. 2b. Mitosis (Metaphase) Nuclear membrane disappears
Chromatid pairs line up in the middle of the cell
metaphase = middle

15. 2c. Mitosis (Anaphase) Chromatids separate
Chromatids move apart to opposite sides of the cell
anaphase = apart
Cell becomes stretched

16. 2d. Mitosis (Telophase)
Two nuclear membranes form around each set of chromosomes
telophase = two new nuclear membranes
Mitosis is over

17. 3. Cytokinesis Cell divides in two
Cells without a cell wall (ex: animal cells):
Cell pinches in two
Cells with a cell wall (ex: plants):
A cell plate forms between the two new cells

19. Demo of Mitosis See “Cells Alive” video/demo

21. WARM UP: Which phase of the cell cycle?
Interphase
Telophase
Anaphase
Metaphase

22. Place the following Cell Cycle illustrations in order:B C E D F

23. Cell Cycle/Mitosis Review
BrainPop - Mitosis

24. How many cells? How many chromosomes? (TOC #44)
PARENT CELL
Example:
Human Skin Cell 46
Interphase – chromosomes are copied 92
Prophase - pair up
Metaphase – middle
Anaphase – apart
Telophase – two nuclei
Cytokinesis – cell splits in 2 46 46
DAUGHTER CELLS

25. Review Question:
A cell with 10 chromosomes undergoes mitosis and cell division. How many daughter cells are produced and what number of chromosomes do they have?
2 daughter cells, 5 chromosomes each
1 daughter cell, 10 chromosomes each
4 daughter cells, 20 chromosomes each
2 daughter cells, 10 chromosomes each