1. Mitosis!

2. Mitosis
Asexual reproduction is reproduction that occurs when the parent produces offspring without the process of meiosis or and fertilization
Sexual reproduction is when genetic material from two different cells combine producing offspring.
Mitosis is
a form of asexual reproduction
the process in which the nucleus divides to form two new nuclei
(Click on Mitosis above for video) 2

3. How do little elephants grow up to be BIG elephants?

4. Why do animals shed their skin?

5. Three reasons why cells reproduce by asexual reproduction: 1. Growth 2
Three reasons why cells reproduce by asexual reproduction: Growth Repair Replacement
Skin cancer - the abnormal growth of skin cells - most often develops on skin exposed to the sun.
Cell that reproduce by asexual reproduction reproduce constantly.

6. Genetic Material (DNA)
Is found inside the nucleus of the cell
Every human body cell has 46 chromosomes (23 from mom, 23 from dad)
DNA is copied during interphase (before mitosis starts)

7. The process of asexual reproduction begins after a sperm fertilizes an egg.

8. What living things use mitosis?
Both plants and animals use mitosis
Some unicellular organisms use mitosis to reproduce

9. Plant and Animal Cells
Plant cells have chloroplast (for photosynthesis)-they also have cell walls
Plant cells also have large vacuoles to store water
Animal cells have no chloroplast or cell wall-contains small vacuoles if any

11. Temporary Cell Structures in Mitosis
Centrioles, spindle fibers, centromeres are all temporary structures in the cell used for mitosis

12. Sister Chromatids

13. Centrioles
Centrioles move to the opposite ends of the cell and attach to chromosomes by spindle fibers

14. Animated Mitosis Cycle
Cell Division occurs in a series of stages,
or phases
Interphase
Prophase
Metaphase
Anaphase
Telophase & Cytokinesis

15. Interphase occurs before mitosis begins
Chromosomes are copied (# doubles)
Chromosomes appear as threadlike coils (chromatin) at the start, but each chromosome and its copy(sister chromosome) change to sister chromatids at end of this phase
CELL MEMBRANE
Nucleus
Cytoplasm
Centromere-holds together the sister chromatids

16. Interphase Plant Cell Animal Cell
Photographs from:

17. Prophase 2nd step in Mitosis
Mitosis begins (cell begins to divide)
Centrioles (or poles) appear and begin to move to opposite end of the cell.
Spindle fibers form between the poles.
Centrioles
Sister chromatids
Spindle fibers

18. Prophase Plant Cell Animal Cell Spindle fibers Centrioles
Photographs from:

19. Metaphase 3rd step in Mitosis
Chromatids (or pairs of chromosomes) attach to the spindle fibers.
Centrioles
Spindle fibers

20. Metaphase Plant Cell Animal Cell
Photographs from:

21. Anaphase 4th step in Mitosis
Chromatids (or pairs of chromosomes) separate and begin to move to opposite ends of the cell.
Centrioles
Spindle fibers

22. Anaphase Plant Cell Animal Cell
Photographs from:

23. Telophase 5th step in Mitosis
Two new nuclei form.
Chromosomes appear as chromatin (threads rather than rods).
Mitosis ends.
Nuclei
Nuclei
Chromatin

24. Telophase Plant Cell Animal Cell
Photographs from:

25. Cytokinesis occurs after mitosis
Cell membrane moves inward to create two daughter cells – each with its own nucleus with identical chromosomes.

26. Animal Mitosis -- Review
Interphase                                                             
Prophase                                                             
Metaphase                                                             
Anaphase                                                             
Telophase                                                             

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

28. Cell Cycle

29. Mitosis Animation