1. How Cells Divide

3. Interphase What the cell spends 90% of its time doing.
Divided into G1,S, and G2 stages
This is where the cell goes about basic life functions of growth, DNA copying and regulation

4. G1
During this stage new organelles are being synthesised, so the cell requires both structural proteins and enzymes, resulting in great amount of protein synthesis.
In short the cell grows (Growth phase)

5. S
synthesis phase, is a period when DNA synthesis or replication occurs.

6. G2
Cell grows more and prepares to divide

7. Cell cycle

8. Did you notice the check points?

9. Mitosis
(The M phase)
Before We Split mitosis= the division of a cell's nucleus. Along with cytokinesis (the division of the rest of a cell), mitosis results in a parent cell dividing into two daughter cells. The genetic information within each of these daughter cells is identical.

10. This is how we get sister chromatids
This is how we get sister chromatids

11. Nuclear envelope breaks down Spindle fibers (microtubules) attach
Nuclear envelope breaks down
Spindle fibers (microtubules) attach
Sister chromatids pair up
Spindle fibers form

12. Chromosomes line up in the center of the cell
Chromosomes line up in the center of the cell
½ of each chromosome (1 chromatid) is pulled to each pole of the cell

13. Nuclear envelope reforms
Nuclear envelope reforms

14. Cytokinesis (the final step)
Cytokinesis is the process of splitting the daughter cells apart.
Whereas mitosis is the division of the nucleus, cytokinesis is the splitting of the cytoplasm and allocation of the golgi, plastids and cytoplasm into each new cell.

16. Meiosis

18. Prophase I
Homologous chromosomes pair up (each made up of 2 sister chromatids)
Homologous chromosomes swap some allele information
Nuclear envelope disappears

19. See information is swapped
Metaphase I
See information is swapped
Chromosomes line up down the middle
Spindle fibers attach

20. Anaphase I
1 of each of the Homologous chromosomes is pulled to each side of the cell

21. Telophase I & Cytokinesis
The cell divides down the middle
Nuclear envelope sometimes reforms

22. Telophase I & Cytokinesis
The cell divides down the middle
Nuclear envelope sometimes reforms

23. No new Interphase!

24. Prophase II
Spindle fibers form
Nuclear envelope disintegrates

25. Metaphase II Chromosomes line up in the center of the cell
Spindle fibers attach

26. Anaphase II Sister chromatids separate

27. Telophase II & Cytokinesis
Nucleus reforms
Not that each of the four cells is haploid

29. Did catch the Differences?
Check out this Sweet animation

30. Taken from

31. Comparing the Two

32. So....
Homologous chromosomes swap information in meiosis
In meiosis 1 homologous chromosomes not sister chromatids are separated
Meiosis ends with 4 daughter cells, Mitosis ends in 2