1. Mar. 7, 2018
You need: Clean paper / pencil Mitosis poster Warm Up: Mental Math I CAN: compare the phases of mitosis and meiosis.

2. Housework Tornado drill Poster Review Puzzle of meiosis
Compare the two

3. MITOSIS
MEIOSIS

4. IPMATC REMEMBER! Interphase Prophase Metaphase Anaphase Telophase
Cytokinesis
IPMATC
A mnemonic to help remember the stages of mitosis.
Iguanas Pee More Accurately Than Cats.

5. Igloos Predict Meteorites Aiming To California (CCC)
In Private, My Alligator Takes Candy (JCT)
It (Pennywise’s) Poop Make All-powerful Thanos Cry (ME)
Internet Posts Makes Anyone Talk Crazy (MH)
I Prefer My Alligator To Cats (HM)
I Play Music At The Church (IP)
I Play Music At The Carnival (ER)
I Park My Aunt’s Tall Car (MW)
Invisible People Maybe Ate The Chicken (AAG)
In People’s Mind A Telophone Crings (JAS)
I Pee More At The Televised Church (AB)
I Party Max At The Club (JB)
I Picked My Apples To Count (AB)
Ice cream Probably Makes Animals Talk Crazy (TC)
Insect Pajamas Make A Tiger Cry (TR)
I Peel More Apples Than Clark. (KT)

7. Interphase Description of events: Centriole pair replicates.
DNA replicates to create duplicated chromosomes.

8. Prophase Description of events:
Centriole pair begins to migrate to opposite poles.
Nuclear membrane begins to dissolve.
Spindle fibers begin to form between centriole pairs.
Duplicated chromosomes begin to condense.
Nucleolus begins to disappear.

9. Metaphase Description of events:
Centriole pairs are fully migrated to opposite poles.
The spindle apparatus is fully formed.
Spindle fibers have moved the duplicated chromosomes so that they line up at the midline of the cell.
Nuclear membrane has completely disappeared.
Duplicated chromosomes are at their most condensed at this stage.

10. Anaphase Description of events:
Spindle fibers pull the sister chromatids apart at the centromere and drag them to opposite poles.
The cell elongates.
Anaphase

11. Telophase Description of events:
The cell begins cytokinesis by forming a cleavage furrow (pinch) to divide the cytoplasm.
Nuclear membranes begin to reform around the separate (but identical) sets of chromosomes.
Spindle apparatus has disassembled and the spindle fibers dissolve.
Chromosomes begin to de-condense.
Nucleolus begins to re-form.
Telophase

12. After cytokinesis Description of events:
The two identical daughter cells are completely separated.
Spindle fibers have completely disappeared.
The chromosomes are completely de-condensed and lengthened.
The nucleolus is very distinct.
The nuclear membrane has completely re-formed around the chromosomes.
After cytokinesis

13. PUZZLE TIME!!
MITOSIS

14. Starting point:
You want to start with one cell that has 100% of the genetic information (like a normal body cell). To keep things simple, we will work with a cell that has 4 chromosomes in a normal body cell.

15. Your goal:
To create TWO cells that each have 100% of the genetic information. These would have FOUR chromosomes each…and look just like the original.

16. START
Anaphase
Interphase
Prophase
Telophase
Metaphase
Cytokinesis

17. Did you reach the goal? Two cells and each has exactly 100% of the genetic material? Is the genetic material the same in these cells? Is that good or bad? Why?

18. Mitosis QUIZ!
Clear away your notes. NOTHING out except clean, empty notebook paper and a pencil.
You will need to find the best answer – without using notes, books, or neighbors.
Be sure to fill in all that you can. Talking/communicating with others will be a zero!

19. 5. What phase of MITOSIS is the cell below in?

20. PUZZLE TIME!!
MEIOSIS

21. Starting point:
You want to start with one cell that has 100% of the genetic information (like a normal body cell). To keep things simple, we will work with a cell that has 4 chromosomes in a normal body cell.

22. Your goal:
To create FOUR cells that only have 50% of the genetic information. These would only have TWO chromosomes (NOT 4).

23. Cut and arrange
Cut along the dotted lines. They are all squares or rectangles – so it should be easy to maintain a straight, neat line.
Be aware – safety is always a concern with scissors. It would awful to try to do this without scissors as a tool. Keep safety first!!
Do NOT glue – until the class has agreed on the order of the pieces.

24. Puzzle check
Knowing if you have the right process is tricky. Let’s try watching the steps.
Cells Alive! (meiosis)

25. Starting point:
You want to start with one cell that has 100% of the genetic information (like a normal body cell). To keep things simple, we will work with a cell that has 4 chromosomes in a normal body cell.

26. After we start…
Before we can split to smaller groups, we need to copy the information. This reminds me of mitosis!

27. Once copies have been secured (copy and original are sticking together
Once copies have been secured (copy and original are sticking together!), then we line them up…
Metaphase

28. After lining up in the MIDDLE, we have to split
After lining up in the MIDDLE, we have to split. This is different than MITOSIS, though. How?
In MITOSIS, the chromosomes line up in the middle vertically and all four would split in half. But in MEIOSIS, they have split the total in half – not the chromosome and it’s copy!

29. After the ONE nucleus splits into TWO nuclei, we still need to split the original chromosome from it’s copy.

30. Lining up in the MIDDLE – like Metaphase…AGAIN!!
This time they are ready to separate the original chromosome and it’s copy.

31. Each chromosome (copy and original is separated
Each chromosome (copy and original is separated. Now the TWO look like they are becoming FOUR.

32. Did you reach the goal? Four cells and each has only ½ of the genetic material? Is the genetic material the same as each of the other cells?
If not all of these cells have the same genetic information, is that bad or good? Why?

33. Cheat / Hint:

34. Meiosis NOT Mitosis Used to create a cell that has ONLY 50% of DNA
Happens in the SEX ORGANS
Allows for different combinations of DNA

35. MITOSIS
MEIOSIS