Senior High School Material Mitosis an Asexual Reproduction.ppt

Mitosis is an asexual reproduction.

1. 1
1
Asexual Reproduction
Mitosis

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

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

5. 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. Animated Mitosis Cycle
http://www.cellsalive.com/mitosis.htm
•Interphase
•Prophase
•Metaphase
•Anaphase
•Telophase & Cytokinesis

7. •Chromosomes are copied(# doubles)
•Chromosomes appear as threadlike coils
(chromatin) at the start, but each chromosome and
its copy(sisterchromosome) change to sister
chromatidsat end of this phase
CELL
MEMBRANENucleus
Cytoplasm

8. Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

9. •Mitosisbegins (cell begins to divide)
•Centrioles(or poles) appear and begin to move
to opposite end of the cell.
•Spindle fibersform between the poles.
Centrioles
Sister chromatids
Spindle fibers

10. Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
Spindle fibers
Centrioles

11. •Chromatids (or pairs of chromosomes) attach to
the spindle fibers.
Centrioles
Spindle fibers

12. Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

13. •Chromatids (or pairs of chromosomes) separate
and begin to move to opposite ends of the cell.
Centrioles
Spindle fibers

14. Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

15. •Two new nuclei form.
•Chromosomes appear as chromatin (threads
rather than rods).
•Mitosis ends.
NucleiNuclei
Chromatin

16. Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

17. •Cell membrane moves inward to create two
daughtercells –each with its own nucleus with
identical chromosomes.

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

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

20. 21

21. 1.What is mitosis?
2.What is the impotance of mitosis?
3.Where does mitosis occur in human body?
4.How many chromosomes will be found in
each of two cells formed as the result of
mitotic cell division?
5.Explain every phase in mitosis!