Tues. Nov. 6th

Meiosis - Internet Lesson
In this investigation, you will view sites that illustrate the process of meiosis. For each site answer the questions associated in your notebook.  YOU DO NOT NEED TO WRITE THE QUESTIONS.

Remember, you may only have half the period to do as much as possible.

Site 1 - Lew-Port's Meiosis Page

Go to Lew-Port's Meiosis Page

Answer the Following Questions in your notebook:

1. How many chromosomes does the cell in this animation start with ? __________________
2. The homologous pairs are represented by similar ________________________
3. When chromosomes make copies of themselves, they _____________________________
4. Copies of chromosomes are held together by the _____________________________
5. Each chromosome finds its __________________________________________
6. Draw "crossing over" - using your pencil to shade in the areas that exchange parts.
7. How many chromosomes are at each pole of the cell? ___________
8. During meiosis 2, chromosomes line up again along the cell's ___________________________
9. Only _________ copy of each chromosome moves toward the poles. Which means only _________ chromosomes of the original six.
10. New membranes form around each ____________________________
11. Each cell divides, forming a total of ______________ cells.

Next:
Go to meiosis Animation
Click on the animation until you reach Telophase 1 Cytokinesis. Repeat as many times as
necessary to answer questions & summarize the first stage of meiosis

1. At the start of this example how many chromosomes are in the cell? _________
2. What happens in the “S” phase to the chromosomes? _______________
3. If a chromosome replicates but remains attached does it count as one or two chromosomes?
_______________
4. What happens to the chromosomes at the end of prophase 1 that is different from mitosis?
_______________ Did you notice any trading of pieces between the red and blue____.
chromosomes? ________________
5. At which phase do the chromosomes separate? _________________
6. At the end of telophase 1 & cytokinesis what do you end up with?
Number of cells ______________ number of chromosomes in each cell? _______
Is each cell haploid or diploid? _________________. Notice again that some trading of
chromosome pieces has occurred. This is called crossing over.

Done Early:
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