1. MEIOSIS Pipecleaner review
Open to the next blank page of your journal Title the page “Meiosis Pipe-cleaner Activity” Please wait for a thumbs before moving onto the each phase, and answer all numbered questions in complete sentences.

2. MEIOSIS Pipecleaner Activity
On your page, write “Meiosis 1” and draw a cell outline for each stage
As you wait for a thumbs up that each stage is correct, draw your chromosomes into the correct cell
You don’t need to use color!

3. MEIOSIS Pipecleaner Activity
Work with a partner to create a Gamete!
Create replicated chromosomes by twisting two pipe-cleaners of the same color together
Each partner is responsible for making one set of chromosomes (either chromosomes from mom, or dad)
Mom=lighter shades of each color, dad=darker shades of each color
Use a whiteboard and whiteboard marker to show the cell boundaries

4. MEIOSIS Pipecleaner Activity
A male DIPLOID animal has 2 pairs (2n=4) of chromosomes.
Model what the chromosomes look like during PROPHASE I
Make sure to draw it into your cell!
** INCLUDE CROSSING OVER (though you won’t be able to carry it into anaphase)
1) What do we call a homologous pair grouped together?

5. MEIOSIS Pipecleaner Activity
Model what the chromosomes look like during Metaphase I
Make sure to draw it into your cell!
2) How would you model independent assortment?
3) How many chromosomes and homologous pairs do you have?

6. MEIOSIS Pipecleaner Activity
Continue to manipulate the pipe-cleaners through Meiosis I (anaphase I, telophase/cytokinesis I) Make sure to draw both phases into the correct cells in your journal!

7. MEIOSIS Pipecleaner Activity
Take your cells through the end of Meiosis II.
Write “Meiosis II” on your page, and draw a picture of your chromosomes in each phase of Meiosis II.
Include the name of each phase.
4) Describe the products of meiosis.

8. MEIOSIS Pipecleaner Activity
Go back and use pipe-cleaners to model what happens to the 6 chromosomes when one of the homologous pairs does not separate during Anaphase I. It is called “non-disjunction 1” when chromosomes fail to separate properly during Anaphase I.

9. MEIOSIS Pipecleaner Activity
Write “Non-disjuction 1” and draw the cells produced at the end of Meiosis II 5) How does non-disjunction affect the resulting daughter cells? 6) How might non-disjunction result in some genetic disorders?

10. MEIOSIS Pipecleaner Activity
Go back and use pipe-cleaners to model what happens to the 6 chromosomes when one of the chromatids does not separate during Anaphase II. Write “Non-disjunction 2” and draw the daughter cells produced at the end of Meiosis II

11. MEIOSIS Pipecleaner Activity
It is called “non-disjunction 2” when chromosomes fail to separate properly during Anaphase II.
7) How does non-disjunction 2 affect the resulting daughter cells?
8) Is it more or less likely then non-disjunction 1 to cause genetic disorders??