1. Cell cycle
The phases!

2. Cell cycle Map

3. Interphase Interphase: Parts of Interphase:
most of the cells “life” (G1, S, G2 phase)
Parts of Interphase:
G1phase:
spends most of its functional life
performing their assigned tasks, metabolizing, synthesizing etc.
something triggers the cell to begin a cell division event
Stimuli to start a cell division:
To replace dead or dying cells,
To produce more cells to enlarge the organism (growth and development)
Reproduction, i.e. to increase the number of unicellular organisms.

4. S - Phase
= synthesis phase.
DNA molecules are copied or replicated

5. Gap 2 or G2 Phase
The cell is preparing for the actual division events (much protein synthesis).
tubulin synthesized (protein of which microtubules are made)
used to manufacture the spindle apparatus
G2 completes interphase now the cell is prepared for mitosis.

6. Chromosome structure

7. On to mitosis!

9. MITOSIS
Definition: The process by which the nucleus of a cell divides into 2 identical cells. Cell Division.
Diploid  2

10. Prophase

11. PROPHASE 1st stage of mitosis DNA coils into chromosomes
Nuclear membrane begins to dissolve
Centrioles move to opposite ends of the cell
Spindle fibers begin to appear

12. Metaphase

13. METAPHASE Chromosomes line up at the equator (middle - meta)
Spindle fibers attach to the chromosomes

14. Anaphase

15. ANAPHASE Chromosomes separate into separate but identical chromatids.
Each chromatid is pulled by spindle fibers to the opposite poles

16. Telophase

17. TELOPHASE Cell begins to pinch in two.
Nuclear membrane begins to surround new sets of chromosomes
Chromosomes begin to uncoil so protein can be made

18. Cytokinesis

19. Cytokinesis Cytoplasm divides Each cell has identical DNA
Cells are completely separate now.
Ready for Interphase

23. Plant cell division absence of centrioles Cytokinesis different
simply generate a new cell wall between the developing telophase nuclei
CELL PLATE
The cell plate originates from the fusion of several (many) vesicles which originate from the golgi.

24. Plant Cell Division After nucleus has divided…
2 new IDENTICAL daughter cells
A plant cell after mitosis
Formation of Cell Plate
Vesicles that contain cell wall material

25. Animal cell division

26. Animal vs Plant (cytokinesis)

27. Cell Cycle v. Cell division
Interphase, prophase, metaphase, anaphase and telophase (IPMAT) = Cell cycle.
Prophase, metaphase, anaphase and telophase (PMAT) = Mitosis otherwise known as cell division of body cells (non-sex cells).