1. Courtesy of Julie Camp and Science Spot.com
Asexual Reproduction
Mitosis
EQ: Mitosis is the process in which a cell’s nucleus can divide into two nuclei. During this process one cell becomes two identical cells. What events take place during this cell cycle?
Mr. Kowaleski
8th Grade Science
Courtesy of Julie Camp and Science Spot.com 1

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

3. Why do animals shed their skin?

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

5. What are three reasons cells need to reproduce asexually?
Growth
Repair
Replacement
Skin cancer - the abnormal growth of skin cells - most often develops on skin exposed to the radiation of the sun.
Cells that reproduce by asexual reproduction reproduce constantly.

6. Cell Division occurs in a series of stages, or phases

7. 1st: Interphase 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
centromere
Sister chromatid
CELL MEMBRANE
Nucleus
Cytoplasm

8. Humans have 46 chomosomes

9. Interphase Plant Cell Animal Cell
Photographs from:

10. 2nd: Prophase 1st 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

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

12. 3rd: Metaphase 2nd step in Mitosis
Chromatids (or pairs of chromosomes) attach to the spindle fibers.
centromere
Sister chromatid
Centrioles
Spindle fibers

13. Metaphase Plant Cell Animal Cell
Photographs from:

14. Anaphase 3rd step in Mitosis
Chromatids (or pairs of chromosomes) separate and begin to move to opposite ends of the cell.
Sister chromatids split
Centrioles
Spindle fibers

15. Anaphase Plant Cell Animal Cell
Photographs from:

16. Telophase 4th step in Mitosis
Two new nuclei form.
Chromosomes appear as chromatin (threads rather than rods).
Mitosis ends.
Nuclei
Nuclei
Chromatin

17. Telophase Plant Cell Animal Cell
Photographs from:

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

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

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

21. IPMATC REMEMBER! Interphase Prophase Metaphase Anaphase Telophase
Cytokinesis
IPMATC
A mnemonic to help remember the stages of mitosis.
I Pray More At The Church

22. Cell Cycle

23. - Cell Division
The Cell Cycle 23

24. Mitosis Animation