1. Bell work
Pick up:
Plickers card
Copy of the power point
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2. MITOSIS A CELL GROWTH AND DIVISION PRODUCTION
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3. Objectives Evaluate the reasons for asexual reproduction in organisms
Differentiate between the different stages of the cell cycle in terms of order of occurrence, and chromosome location
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4. If you were a cell, you could just make your own best friend
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5. Why do animals shed their skin?
THINK – PAIR - SHARE
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6. How does a cut heal?
THINK – PAIR - SHARE
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7. Asexual reproduction - Requires only ONE parent/cell
Rreasons why cells reproduce/divide:
Multicellular organisms:
Growth of the organism
Repair/replace damaged or worn out cells of the body
Unicellular organisms:
Asexual Reproduction (to increase population numbers
Asexual reproduction - Requires only ONE parent/cell
Sheldon Mitosis

8. At what point does it become necessary for a cell to divide?
When the cells resources are under too great a strain from it’s size
Cell Membrane not large enough to maintain needs coming in/going out
DNA, used for protein synthesis, cant keep up with demands
Organelles unable to keep up with demands (not enough nutrients coming in or not enough waste removal)
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9. 3 Main Stages of Cell Cycle:
Interphase G1 S G2
Mitosis – M phase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
Cell Cycle

10. Which phase does the cell spend the most time in?
Interphase
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11. animation Mitosis animation – mcgraw-hill
Cell cycle animation – cells alive website
Mitosis – sumanas (step by step w/ tutorial and quiz)
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12. Interphase 3 phases: G1: Growth and everyday activities
Time in a cell’s life between cell divisions
90% of a cell’s life
3 phases:
G1: Growth and everyday activities
S: DNA replication
G2: preparation for Mitosis (production of necessary proteins/organelles)
Interphase

13. The process of dividing the nucleus
Mitosis

14. Mitosis
Creates two daughter cells that are identical to each other AND identical to the parent cell
Allows organisms to grow, repair and replace cells
P-M-A-T
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15. Let’s discuss Chromosomes:
What do they look like?
How many do humans have?
46 (23 pairs)
(23 from mom, 23 from dad)
an “X” after DNA replication (just before the cell divides)
an “I” after the cell divides

16. Vocabulary Terms
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17. Vocabulary terms
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18. Cell Division in eukaryotes
There are two different types of cell division
Which type is performed depends on the kind of “daughter cells” that are desired
Meiosis = genetically different daughter cells with half the amount of DNA
Mitosis = identical daughter cells with same amount of DNA
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19. Somatic Cells Gamete Every cell in the body EXCEPT reproductive cells
Have all 46 chromosomes
Gamete
Sexual reproduction cells
(Example: sperm for males,
Ova/eggs for females)
have half the amount DNA (23 chromosomes)
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20. Which cells do Mitosis?
Somatic OR
Gametes
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21. The DNA is chromatin
INTERPHASE
Chromatin vs. Chromosomes
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23. The DNA (chromatin) organizes into chromosomes
The nuclear membrane disappears
Centrosomes (centrioles) move to opposite ends of cell & make spindle fibers
PROPHASE
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25. Chromosomes have attached to spindle fibers and are making their way toward the midline of the cell
PROMETAPHASE
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26. Chromosomes attach to spindle fibers (by their centromeres), and line up at the center of the cell
METAPHASE
Spindle Fibers – microtubules that help separate chromosomes during division
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29. Chromosomes separate at the centromere, and the sister chromatids are pulled toward opposite ends of the cell.
ANAPHASE
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31. Chromosomes disorganize and the nuclear membrane begins to reform.
TELOPHASE
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33. Division of the Cytoplasm to create 2 separate cells
CYTOKINESIS
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34. CYTOKINESIS The division of the cell’s cytoplasm
Usually begins during Telophase
Finalizes the production of two new daughter cells.
Each new cell will have about ½ of the cytoplasm and organelles of the parent cell.
CYTOKINESIS
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35. CLEAVAGE FURROW VS. CELL PLATE CYTOKINESIS Plants ANIMAL Cell plate
A cell wall is rigid and cannot pinch together.
A cell plate (made of cellulose) begins to form between the two new cells. This cell plate will harden and become a cell wall for each.
ANIMAL
Cleavage furrow Cell membrane “pinches in” to form two separate
cells
CYTOKINESIS
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36. CLEAVAGE FURROW VS. CELL PLATE
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37. Taylor Swift’s true inspiration
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38. Can you make a better mnemonic?
REMEMBER:
Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
I PLAY MUSIC AT THE CLUB
I P M A T C
Can you make a better mnemonic?
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39. Animal Mitosis -- Review
Interphase                                                             
Prophase                                                             
Metaphase                                                             
Anaphase                                                             
Telophase                                                             
Cytokinesis                                                             
Animal Mitosis -- Review

40. Plant Mitosis -- Review
Interphase                                                             
Prophase                                                             
Metaphase                                                             
Anaphase                                                             
Telophase                                                             
Cytokinesis                                                             
Plant Mitosis -- Review