1. Binary Fission: Cell Division in Prokaryotic Cells
asexual reproduction in which one cell divides into two identical daughter cells

2. How cells divide to make new cells
The Cell Cycle
How cells divide to make new cells

3. Just like people have phases of development,

4. Cells have phases too.

5. In somatic (body) cells, a parent cell produces 2 daughter cells
In somatic (body) cells, a parent cell produces 2 daughter cells. The purpose of cell division is for growth and repair of tissue.

7. Three Phases or Stages
Interphase
Mitosis
Cytokinesis

8. Interphase

9. Interphase DNA and organelles replicate
Cell spends most of its life in this stage

10. Stages of Interphase G1 (growth) normal activities – endo & exo
S (synthesis) genetic material is duplicated so each daughter cell contains the same amount of genetic material as the parent cell
G2 (growth) preparing for cell division

12. Mitosis
Nucleus divides
Duplicated DNA is divided into two new nuclei

14. Stages of Mitosis
Prophase
Metaphase
Anaphase
Telophase

15. Prophase

16. Prophase Nuclear membrane breaks down
Genetic material (chromatin) condenses
Centrioles migrate to opposite ends of poles (in animal cells)
Microtubules (spindle fibers) attach to centrioles

17. Prophase

18. Metaphase

19. Metaphase Duplicated chromosomes line up on the equator of the cell
Microtubules (spindle fibers) attach to centromere at kinetochore

20. Metaphase

21. Anaphase

22. Anaphase
Duplicated chromosomes (also called sister chromotids) separate
1 of each pair are pulled apart toward opposite poles of the cell

23. Anaphase

24. Telophase

25. Telophase New nuclear membranes form to separate the genetic material
Cleavage furrow in animal cells
Cell plate in plant cells

26. Telophase

27. Mitosis

28. Cytokinesis

29. Cytokinesis Occurs AFTER telophase and BEFORE interphase
Cytoplasm divides

30. Cytokinesis

31. Mitosis Animation

33. What happens when cells divide at an uncontrollable rate?
CANCER

37. Causes of Cancer Tobacco Radiation exposure Viral infections (HPV)
Genetics

38. Cancer Animation