1. cell division
Mitosis

2. Why do cells divide?
There’s not enough DNA to regulate a very large cell
It would have trouble moving material across the cell membrane if it was too big (volume vs. surface area)

3. chromosomes Carry genetic information Made of DNA
Every organism has a specific number (46 in humans, 18 in carrots)
Not visible except in cell division

4. The cell cycle

5. Interphase
Cells grow
Double their DNA
Prepare to divide

6. Prophase, Metaphase, Anaphase, Telophase (PMAT)
Phases of Mitosis

7. Prophase c/s are visible
Centrioles go to opposite sides, spindle forms (only in animal cells)
Nucleolus disappears
Nuclear envelope breaks down

8. metaphase
c/s line up in the middle
Centromeres attach to the fibers

9. anaphase
Chromatids separate and are now c/s

10. telophase
Getting ready for division
Nucleus reforms

11. cytokinesis Division of cytoplasm
In plants a cell plate forms in order to pinch off