1. The Cell Cycle & Cell Division

2. The Cell Cycle
No writing this required right now, just look and listen.

3. MITOSIS 1 of 2 kinds of cellular division, occurs in most of your body cells

4. Mitosis
The process of cell division which results in the production of two daughter cells from a single parent cell.
Mitosis- The daughter cells are identical to one another and to the original parent cell (TRUE clones).

5. Mitosis can be divided into stages
Interphase
Prophase
Metaphase
Anaphase
Telophase & Cytokinesis
No writing this required right now

6. Interphase The cell prepares for division
Animal Cell
DNA replicated
Organelles replicated
Cell increases in size
Plant Cell
DNA replicated
Organelles replicated
Cell increases in size

7. Interphase Plant Cell Animal Cell
Photographs from:

8. Prophase The cell prepares for nuclear division
Animal Cell
Packages DNA into chromosomes
Plant cell
Packages DNA into chromosomes

9. Prophase Plant Cell Animal Cell
Photographs from:

10. Metaphase The cell prepares chromosomes for division
Animal Cell
Chromosomes line up at the center of the cell
Spindle fibers attach from daughter cells to chromosomes at the centromere
Plant Cell
Chromosomes line up at the center of the cell
Spindle fibers attach from daughter cells to chromosomes at the centromere

11. Metaphase Plant Cell Animal Cell
Photographs from:

12. Anaphase The chromosomes divide
Animal Cell
Spindle fibers pull chromosomes apart
½ of each chromosome (called chromotid) moves to each daughter cell
Plant Cell
Spindle fibers pull chromosomes apart
½ of each chromosome (called chromotid) moves to each daughter cell

13. Anaphase Plant Cell Animal Cell
Photographs from:

14. Telophase The cytoplasm divides
Plant Cell
DNA spreads out
2 nuclei form
New cell wall forms between to nuclei to form the 2 new daughter cells
Animal Cell
DNA spreads out
2 nuclei form
Cell wall pinches in to form the 2 new daughter cells

15. Telophase Plant Cell Animal Cell
Photographs from:

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

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

18. Let’s observe Mitosis
Take time now to use the micro-viewers with the prepared slides of cells in various states of mitotic division.
Use what you have taken notes on today with what you see in your viewer to create a learning guide.

19. Telophase & Cytokinesis
Interphase
Prophase
Cell Cycle
&
Cellular Division
Your name
(____________)
Telophase & Cytokinesis
Anaphase
Metaphase

20. Telophase & Cytokinesis
Interphase
Prophase
Cell Cycle
&
Cellular Division
Your name
(____________)
Telophase & Cytokinesis
Anaphase
Metaphase

21. Telophase & Cytokinesis
Interphase
Prophase
Cell Cycle
&
Cellular Division
Your name
(____________)
Telophase & Cytokinesis
Anaphase
Metaphase

22. Challenge Question Must Have Can Include Real world connection
Be MITOSIS only
One human application, and one non-human application
One plant and one animal application
One multicellular and one unicellular application
Survival advantages and disadvantages of using asexual reproduction process of mitosis
A variety of organisms in the biological kingdoms
Pictures (hand drawn)
Colorful pictures (hand drawn)
Information about the survival advantages and disadvantages of using meiosis with sexual reproduction

23. Challenge Assignment Avoid Presentations
Anything that is “silly” or distracting from the content on Mitosis. Stay focused
Using toy or real animals
Making videos
Doing too much, you should make a list of what you will do day-by-day to stay on target
Will be Monday or Tuesday as selected by a random drawing of names
One at a time (not in stations)
Major grade! Rubrics will be provided at the end of the week when your products are being made

24. What I need from you today:
Slip of paper with your (or everyone’s) names on it
Day by Day check list (copy, you keep one too) of what you will complete to be ready by Monday
A brief…summary… of what you will be discussing in your project (organisms, real world applications…)

25. MEIOSIS 2nd kind of cellular division, only happens with the formation of gametes

26. Meiosis- One parent cell produces four daughter cells.
Meiosis is the type of cell division by which germ cells (eggs and sperm) are produced.
Meiosis- One parent cell produces four daughter cells.
Daughter cells have half the number of chromosomes found in the original parent cell.

27. During meiosis, DNA replicates once, but the nucleus divides twice.

28. (Since there are 2 divisions of DNA)
Meiosis
The four stages we learned about before with mitosis are used to describe the stages in meiosis but are then listed as Type 1 or Type 2.
(Since there are 2 divisions of DNA)

29. First Division of Meiosis
Prophase 1: Each chromosome duplicates and remains closely associated. These are called sister chromatids.
Metaphase 1: Chromosomes align at the center of the cell.
Anaphase 1: Chromosome pairs separate with sister chromatids remaining together.
Telophase 1: Two daughter cells are formed with each daughter containing only one chromosome of the chromosome pair.
This will seem very familiar to Mitosis…

30. Prophase I

31. Prophase I

32. Metaphase I

33. Telophase I

34. Second Division of Meiosis

35. Second Division of Meiosis
Prophase 2: DNA does not replicate.
Metaphase 2: Chromosomes line up at the center of the cell
Anaphase 2: Centromeres divide and sister chromatids move separately to each pole.
Telophase 2: Cell division is complete.
Four haploid daughter cells are formed.
“Half”

36. Prophase II

37. Metaphase II

38. Telophase II

39. Meiosis

40. Meiosis Animation

42. Differences in Mitosis & Meiosis
Asexual
Cell divides once
Two daughter cells
Genetic information is identical
Meiosis
Sexual
Cell divides twice
Four haploid daughter cells
Genetic information is different

43. Telophase II & Cytokinesis II
Mitosis vs. Meiosis
Mitosis happens in your normal body cells, Meiosis happens only in your gametes
Mitosis Replicates and Divides the DNA once (full set, Diploid), Meiosis Replicates the DNA once and Divides twice (half set, Haploid)
Interphase II
Prophase II
Telophase II & Cytokinesis II
Anaphase II
Metaphase II

44. Comparison Animations

45. So, what happens if these processes produce errors?...