1. Asexual Reproduction Mitosis
The process in which the nucleus divides to form two new nuclei. 1

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

3. Why do animals shed their skin?

4. 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.

5. Animated Mitosis Cycle
Interphase
Prophase
Metaphase
Anaphase
Telophase & Cytokinesis

6. Paper Plate #1-Interphase occurs before mitosis begins
Gap 1 Phase – Cell grows to mature size – organelles are duplicated
Synthesis (S) Phase – Chromosomes are copied
Gap 2 (G2) Phase – Cell continues to grow and prepares to divide
CELL MEMBRANE
Nucleus
Cytoplasm

7. 7th Period Gifted Class Only
G1 – checkpoint
Is the Cell large enough?
Are sufficient nutrients available?
Are growth factors present?
G2 checkpoint
Was DNA replicated correctly?
Is the cell large enough?

8. Interphase Plant Cell Animal Cell
Photographs from:

9. Paper Plate #2 Prophase -1st step in Mitosis
Mitosis begins (cell begins to divide)
Chromotin strands condense to form chromosomes
Nuclear membrane breaks down
Spindle fibers form a bridge between the two ends of the cell.
Centrioles
Sister chromatids
Spindle fibers

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

11. Paper Plate #3 Metaphase - 2nd step in Mitosis
Chromatids (or pairs of chromosomes) line up in the center of the cell and attach to the spindle fibers at the centromere.
Centrioles
Spindle fibers

12. Metaphase Plant Cell Animal Cell
Photographs from:

13. Paper Plate #4 Anaphase - 3rd step in Mitosis
Chromatids (or pairs of chromosomes) separate at the centromere
Each chromatid moves to the opposite end of the cell along a spindle fiber
Centrioles
Spindle fibers

14. Anaphase Plant Cell Animal Cell
Photographs from:

15. Paper Plate #5 Telophase - 4th step in Mitosis
Two new nuclei form.
Chromosomes appear as chromatin (threads rather than rods).
Mitosis ends.
Nuclei
Nuclei
Chromatin

16. It is only the final stage that differs in plant and animals
In animal cells a ring of actin filaments forms round the equator of the cell and then tightens to form a cleavage furrow which splits the cell into two In plant cells vesicles move to the equator, line up and fuse to form two membranes called the cell plate. A new cell wall is laid down between the membranes, which fuse with the existing well wall.

17. Telophase Plant Cell Animal Cell
Photographs from:

18. Paper Plate #6 Cytokinesis occurs after mitosis
Cell membrane moves inward to create two diploid daughter cells have formed– each with its own nucleus with identical chromosomes.

19. Mitosis produces identical offspring

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

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

22. Cell Cycle

23. - Cell Division
The Cell Cycle 24

24. Cancer?
Unregulated mitosis
Benign
Malignant/ metastasis

25. Mitosis Animation