1. The Cell Cycle & Cell Division

2. The Cell Cycle

3. Animated Cycle

4. Interphase The cell prepares for division (G1, S, G2)
Animal Cell
DNA replicated
Organelles replicated
Cell increases in size
Plant Cell
DNA replicated
Organelles replicated
Cell increases in size

5. Interphase Plant Cell Animal Cell
Photographs from:

6. MITOSIS

7. Mitosis
The process of cell division which results in the production of two daughter cells from a single parent cell.
The daughter cells are identical to one another and to the original parent cell.

8. Mitosis can be divided into stages
Prophase
Metaphase
Anaphase
Telophase & Cytokinesis

9. Prophase The cell prepares for nuclear division
Animal Cell
DNA coils into chromosomes
Plant cell
DNA coils into chromosomes

10. Prophase Plant Cell Animal Cell
Photographs from:

11. Metaphase The cell prepares chromosomes for division
Animal Cell
Chromosomes line up at the center of the cell
Spindle fibers attach from daughter cells to chromosomes at the centromere
Plant Cell
Chromosomes line up at the center of the cell
Spindle fibers attach from daughter cells to chromosomes at the centromere

12. Metaphase Plant Cell Animal Cell
Photographs from:

13. Anaphase The chromosomes divide
Animal Cell
Spindle fibers pull chromosomes apart
½ of each chromosome (called chromotid) moves to each daughter cell
Plant Cell
Spindle fibers pull chromosomes apart
½ of each chromosome (called chromotid) moves to each daughter cell

14. Anaphase Plant Cell Animal Cell
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15. Telophase/Cytokinesis The cytoplasm divides
Plant Cell
DNA spreads out
2 nuclei form
Cytokinesis: New cell wall forms between to nuclei to form the 2 new daughter cells
Animal Cell
DNA spreads out
2 nuclei form
Cytokinesis: Cell membrane pinches in to form the 2 new daughter cells

16. Telophase
Cytokinesis

17. Telophase Plant Cell Animal Cell
Photographs from:

18. Mitosis Animation

19. Animal Mitosis -- Review
Interphase                                                             
Prophase                                                             
Metaphase                                                             
Anaphase                                                             
Telophase                                                             
Cytokinesis                                                             

20. Plant Mitosis -- Review
Interphase                                                             
Prophase                                                             
Metaphase                                                             
Anaphase                                                             
Telophase                                                             

21. Cell Cycle Review

22. MEIOSIS

23. One parent cell produces four daughter cells.
Meiosis
Meiosis is the type of cell division by which gametes (sex cells: eggs and sperm) are produced.
One parent cell produces four daughter cells.
Daughter cells have half the number of chromosomes found in the original parent cell

24. During meiosis, DNA replicates once, but the nucleus divides twice.

25. Meiosis
There are 2 parts of meiosis
Meiosis 1
Meiosis 2

26. First division of meiosis
Meiosis I
First division of meiosis

27. Meiosis 1
Prophase 1: Each chromosome duplicates and remains closely associated. These are called sister chromatids. Homologous chromosomes will cross over
Metaphase 1: Chromosome pairs align at the middle of the cell.
Anaphase 1: Chromosome pairs are pulled apart with sister chromatids remaining together.
Telophase 1: Two daughter cells are formed with each daughter containing only one chromosome of the chromosome pair.

28. Prophase I

29. Prophase I

30. Metaphase I

31. Telophase I

32. Second Division of Meiosis

33. Second Division of Meiosis
Prophase 2: DNA does not replicate. The cell prepares for Meiosis 2
Metaphase 2: Chromosomes line up in the middle of the cell
Anaphase 2: Centromeres divide and sister chromatids move separately to each pole (or side) of the cell.
Telophase 2: 4 nuclei begin to form and the two cells begin to pinch into 4 cells
Cytokinesis: Cell division is complete and four haploid daughter cells are formed .

34. Prophase II

35. Metaphase II

36. Telophase II

37. Meiosis

38. Meiosis Animation

39. Differences in Mitosis & Meiosis
Asexual
Cell divides once
Two diploid daughter cells
Genetic information is identical
Meiosis
Sexual
Cell divides twice
Four haploid daughter cells
Genetic information is different

40. Comparison Animations