1. MITOSIS

2. The Cell Cycle Interphase: in between stages of dividing in between stages of dividing G1—beginning cell growth G1—beginning cell growth S—DNA duplicates (makes a copy) S—DNA duplicates (makes a copy) DNA is in the form of chromatin DNA is in the form of chromatin G2—cell undergoes it’s function G2—cell undergoes it’s functionPurpose:  to replace dead or dying cells  to allow an organism to grow and develop

3. Mitosis Mitosis animation: http://www.youtube.com/watch?v=2WwIKdyBN_s&feature=related http://www.youtube.com/watch?v=2WwIKdyBN_s&feature=related

4. Mitosis: What is it basically? DNA copies (chromosomes) are separated & sorted into two sides of the cell DNA copies (chromosomes) are separated & sorted into two sides of the cell the cell then splits in two and part of each parent is carried to the two new cells. the cell then splits in two and part of each parent is carried to the two new cells. each ‘daughter’ cell is identical to the parent cell each ‘daughter’ cell is identical to the parent cell results in cells such as internal organs, skin, bones, blood, etc. results in cells such as internal organs, skin, bones, blood, etc.

5. Vocabulary Interphase Interphase Prophase Prophase Metaphase Metaphase Anaphase Anaphase Telophase Telophase Cytokinesis Cytokinesis

6. Interphase occurs just before Mitosis begins: DNA is replicated along with organelles and other cellular components and the cell prepares for division. http://www.bioweb.uncc.edu/1110Lab/notes/notes1/lab6.htm

7. An Electron Microscope Image of Duplicated Pair of Chromosomes

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

9. 1 st step in Mitosis: Prophase (preparation phase) http://www.bioweb.uncc.edu/1110Lab/notes/notes1/lab6.htm the DNA recoils, and the chromosomes condense the nuclear membrane disappears mitotic spindles begin to form.

10. Mitosis Prophase Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm Animal cell Plant cell

11. 2 nd step in Mitosis: Metaphase (organizational phase) spindle fibres attach to the chromosomes at the centromere spindle fibres attach to the chromosomes at the centromere chromosomes line up the middle of the cell chromosomes line up the middle of the cell http://www.bioweb.uncc.edu/1110Lab/notes/notes1/lab6.htm

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

13. 3 rd step in Mitosis: Anaphase (separation phase) the chromosomes split at the centromere the chromosomes split at the centromere the ‘sister ‘chromatids are pulled by the spindle fibers to opposite poles of the cell. the ‘sister ‘chromatids are pulled by the spindle fibers to opposite poles of the cell. http://www.bioweb.uncc.edu/1110Lab/notes/notes1/lab6.htm

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

15. 4 th step in Mitosis: Telophase the chromosomes, the cytoplasm and organelles divide into 2 portions. the chromosomes, the cytoplasm and organelles divide into 2 portions. this diagram shows the end of telophase. this diagram shows the end of telophase. http://www.bioweb.uncc.edu/1110Lab/notes/notes1/lab6.htm

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

17. After Mitosis: Cytokinesis the actual splitting of the daughter cells into two separate cells is called cytokinesis the actual splitting of the daughter cells into two separate cells is called cytokinesis occurs differently in occurs differently in both plant and animal cells. (Cleavage in animals, cell wall in plants) Beginning of cytokinesis in a plant: Beginning of cytokinesis in an animal: http://www.bioweb.uncc.edu/1110Lab/notes/notes1/lab6.htm

18. WHICH STAGE ARE THESE CELLS IN?

19. Mitosis Mitosis animations: Mitosis animations: http://www.youtube.com/watch?v=2WwIKdyBN_s&feature=related http://www.youtube.com/watch?v=2WwIKdyBN_s&feature=related http://www.youtube.com/watch?v=2WwIKdyBN_s&feature=related http://www.youtube.com/watch?v=VlN7K1-9QB0 http://www.youtube.com/watch?v=VlN7K1-9QB0 http://www.youtube.com/watch?v=VlN7K1-9QB0

21. MITOSIS ANIMATION

22. Look at the next few slides in quick succession to see an almost animated plant mitosis sequence.