1. What are we learning today? 1.What are the phases of mitosis and what happens during each phase? 2.What is the significance of mitosis to asexual reproduction?

2. Mitosis Cell division

3. Cell Cycle  Cell division: process by which cells divide to produce new cells.  The two cells are identical to the original cell.(parent cell)  The new cells are called daughter cells Liver Cells

4. Cell Lifespan  As an organism grows and changes, new cells are being produced as old ones are dying. Cell TypeLifespan Red blood cell Platelet Bone cells Brain cells Colon cells Skin cells Stomach cells

5. Cell Lifespan  As an organism grows and changes, new cells are being produced as old ones are dying. Cell TypeLifespan Red blood cell 120 days Platelet Bone cells Brain cells Colon cells Skin cells Stomach cells

6. Cell Lifespan  As an organism grows and changes, new cells are being produced as old ones are dying. Cell TypeLifespan Red blood cell 120 days Platelet10 days Bone cells Brain cells Colon cells Skin cells Stomach cells

7. Cell Lifespan  As an organism grows and changes, new cells are being produced as old ones are dying. Cell TypeLifespan Red blood cell 120 days Platelet10 days Bone cells25-30 years Brain cells Colon cells Skin cells Stomach cells

8. Cell Lifespan  As an organism grows and changes, new cells are being produced as old ones are dying. Cell TypeLifespan Red blood cell 120 days Platelet10 days Bone cells25-30 years Brain cellsLifetime Colon cells Skin cells Stomach cells

9. Cell Lifespan  As an organism grows and changes, new cells are being produced as old ones are dying. Cell TypeLifespan Red blood cell 120 days Platelet10 days Bone cells25-30 years Brain cellsLifetime Colon cells3-4 days Skin cells Stomach cells

10. Cell Lifespan  As an organism grows and changes, new cells are being produced as old ones are dying. Cell TypeLifespan Red blood cell 120 days Platelet10 days Bone cells25-30 years Brain cellsLifetime Colon cells3-4 days Skin cells19-34 days Stomach cells

11. Cell Lifespan  As an organism grows and changes, new cells are being produced as old ones are dying. Cell TypeLifespan Red blood cell 120 days Platelet10 days Bone cells25-30 years Brain cellsLifetime Colon cells3-4 days Skin cells19-34 days Stomach cells 2 days

12. Cell Cycle  Cells undergo a period of growth and a period of division.  The majority of the cell’s life is spent in Interphase  During interphase, a cell grows in size, and carries on metabolism

13. Cell cycle  During interphase, the DNA is in the form of chromatin.  Chromatin is long stringy strands of DNA.  The long strands allow the DNA to be read  The DNA is replicated during interphase (copied)

14. Mitosis  Mitosis: a period of nuclear cell division.  Two daughter cells are formed each with a complete set of chromosomes.

15. Chromosomes  Chromosomes: long, tightly coiled strands of DNA  Carry genetic information which is passed from parent to daughter cell

16. Chromosomes  After being replicated, the chromosome is made of 2 sister chromatids held together by a centromere.

17. Prophase  Prophase: first and longest phase of mitosis  Chromatin coils into visible chromosomes  The nuclear envelope disintegrates.

18. Prophase  Centrioles move to opposite sides of the cell  Spindle fiber forms between them.

19. Prophase  Name the parts of the cell in prophase a.Chromosome b.Centriole c.Spindle fiber d.Nuclear membrane

20. Metaphase  Metaphase: 2 nd phase.  Mitotic spindle is completely formed, connecting the centrioles.  Chromosomes attach to the spindle.  Chromosomes line up along the middle.

21. Anaphase  Anaphase: 3 rd Phase  The two centromeres of the chromosome split apart  Chromatid pairs separate and are pulled to the opposite sides.

22. Telophase  Telophase: 4 th Phase  Chromatids reach the opposite sides.  Spindle fibers break down.  Nuclear envelope forms  Chromosomes unravel

23. Cytokinesis  Cytokinesis: separation of cytoplasm after telophase  New cell membrane forms  Two daughter cells formed.

24. Name the phase.  Metaphase

25. How do you know?  Metaphase

26. Does anything else happen during this phase?  Metaphase

27. Name the phase.  Prophase

28. How do you know?  Prophase

29. Does anything else happen during this phase?  Prophase

30. Name the phase.  Telophase

31. How do you know?  Telophase

32. Does anything else happen during this phase?  Telophase

33. Name the Phase. Anaphase

34. How do you know? Anaphase

35. Does anything else happen during this phase? Anaphase

36. Results of Mitosis  Genetic continuity – two cells which are identical to the parent cell  Cells that are alike can work together to perform a specific task.  Cell Tissue Organ Organ system  No matter how complex the system, the cell is the basic unit of life

37. What order?  How can I remember what order they go in? PMATPMAT  Prophase, Metaphase, Anaphase, Telophase…

38. What are we learning today? 1.What are the phases of mitosis and what happens during each phase? 2.What is the significance of mitosis to asexual reproduction?