1. Asexual Reproduction presents: Mrs. Stewart
Honors Biology: Cell Growth and Division 1 1 1

2. MITOSIS A CELL GROWTH AND DIVISION PRODUCTION
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3. How do little elephants grow up to be BIG elephants?
BELL WORK
How do little elephants grow up to be BIG elephants?

4. Are the cells of the adult elephant larger than those of the baby?
BELL WORK
Are the cells of the adult elephant larger than those of the baby?

5. standards
CLE Describe the relationships among genes, chromosomes, proteins, and hereditary traits.
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6. 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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7. Let’s review: Chromosomes
What do they look like?
How many do humans have?
They look like an “X” just before the cell divides and an “I” after they divide.
46 (23 pairs)
(23 from mom, 23 from dad)

8. 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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9. 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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10. Which cells do Mitosis?
Somatic OR
Gametes
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11. Why do animals shed their skin?
THINK – PAIR - SHARE
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12. How does a cut heal?
THINK – PAIR - SHARE
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13. Asexual reproduction - Requires only ONE parent/cell - Makes Somatic cells
Three reasons why cells reproduce by asexual reproduction: Growth Repair Replacement
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14. 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 (ie: waste removal)
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15. Cell Cycle 2 Main Stages: Interphase G1 S G2 Mitosis – M phase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
Cell Cycle
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16. Which phase does the cell spend the most time in?
Interphase
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18. Create your graphic organizer
CELL CYCLE
INTERPHASE
ANAPHASE
PROPHASE
TELOPHASE
METAPHASE
CYTOKINESIS
Create your graphic organizer
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19. I-P-M-A-T-C Assignment:
Create a mnemonic device to help you remember –
I-P-M-A-T-C
We will vote on the best one tomorrow in class. Winner gets a two day “slack” pass.
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20. animation Mitosis animation – mcgraw-hill
Cell cycle animation – cells alive website
Mitosis – sumanas (step by step w/ tutorial and quiz)
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21. Interphase 3 phases: G1: Growth and everyday activities
Time 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
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22. The process of dividing the nucleus to create two daughter cells, identical to the mother cell
Mitosis

23. Mitosis
Creates two daughter cells that are identical to each other AND identical to the parent cell
Creates diploid cells (two sets of chromosomes in each daughter cell)
Allows organisms to grow
Allows organisms to replace damaged/worn out cells
P-M-A-T-C
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24. The DNA (chromatin) organizes into chromosomes
The nuclear membrane disappears
Centrosomes (centrioles) move to opposite ends of cell
PROPHASE
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25. 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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26. Chromosomes separate at the centromere, and the sister chromatids are pulled toward opposite ends of the cell.
ANAPHASE
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27. Chromosomes disorganize and the nuclear membrane begins to reform.
TELOPHASE
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28. The division of the cell cytoplasm, usually beginning during Telophase and finalizing 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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29. Cleavage furrow indentation of the cell membrane to form two separate
VS.
CELL PLATE
Plants
Cell plate
A cell wall is rigid and cannot flexibly move and pinch together to separate the newly formed cells. So, a cell plate forms between the two new cells. This cell plate will harden and become a cell wall for each.
ANIMAL
Cleavage furrow indentation of the cell membrane to form two separate
cells
CYTOKINESIS
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30. CLEAVAGE FURROW VS. CELL PLATE
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31. REMEMBER: I P M A T C Interphase Prophase Metaphase Anaphase Telophase
Cytokinesis
I PLAY MUSIC AT THE CLUB
I P M A T C
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32. Create your post-it note paper
Musical chairs
Students are each given 6 post it notes and told to write the names of the stages of the cell cycle on them. Then they are told to put those stages in order (IPMATC). Then, they must mix them up. At that point, turn on some music and have the students move around the room. When the music stops, the students must stay at the closest desk and put the post it notes back in order. Have students chant the stages of the cell cycle as a class. Mix up the post-its again and repeat musical chairs.
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33. Animal Mitosis -- Review
Interphase                                                             
Prophase                                                             
Metaphase                                                             
Anaphase                                                             
Telophase                                                             
Cytokinesis                                                             
Animal Mitosis -- Review

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

35. Identify the following: Structure X Structure Y
Reflection: Y
Identify the following:
Structure X
Structure Y
Which stage of the cell cycle is shown?
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