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AP Meiosis Sordaria

When you click Submit (at the bottom of this web page) it will save your work on the server for me. If you get a "proxy error" hit -refresh- until you get a "Thanks"

You might want to actually write your answers in Word (so you can spell check them) and then cut-and-paste into the boxes. That way, if the computer misplaces your work you can just re-paste the answers.

Since we may work on this over more than one day, and you can work at home, I will keep track of what you have done. Feel free to click submit as you work to save your work to the server. 

TAB OR USE THE MOUSE Between the fields....

Answer the questions as best you can. The boxes will expand as you type if you need more space. (Don't worry if it is a one word answer. The box size is standard.)

Since you will be working in groups, put all the names of the people in the group in the box. The ideal group size is 2. As an exception I will allow groups of 3. No groups of 4 or 5. If you work as a group of 3 I expect better answers. Group sizes above 3 will be penalized in the grading.



Class Period

1 2 3 4 5 6 7 8

To answer these questions  you can

(1) do the simulated lab at lab bench The Biology Place/Lab Bench/Lab 3

 (2) do the simulated lab in APLab03 in "shortcut to shortcuts" (Meiosis) [You do better to start this from "shortcut to shortcuts" rather than from this link]

(3) examine the pictures on the "shortcut to shortcuts" Sordariapics Web Page

Question 1:  List three major differences between the events of mitosis and meiosis/

Compare Mitosis and Meiosis with respect to each of the following:

  Mitosis Meiosis
Chromosome number of parent cells 2 3
Number of DNA replications 4 5
Number of Divisions 6 7
Number of Daughter Cells Produced 8 9
Chromosome number of daughter cells 10 11
Purpose 12 13


Question 14:  How are Meiosis I and Meiosis II different?

Question 15:  How do oogenesis and spermatogenesis differ?

Question 16: Why is meiosis important for sexual reproduction?

Remember, the boxes will expand as you type if you need more space.

Using your data determine the distance between the gene for spore color and the centromere. Calculate the percent of crossovers by dividing the number of crossover asci (2:2:2:2) or (2:4:2) by the total number of asci x 100. To calculate the map distance, divide the percentage of crossover asci by 2. The percentage of crossover asci is divided by 2 because only half of the spores in each ascus are the result of a corssover event.  Record the results in the table. You can combine the data from the NEO simulation and the photographs.

Number 4:4 Number of Asci showing crossing over Total Asci % Asci Showing crossing over Divided by2 Gene to Centromere distance (Map Units
17 18 19 20 21

22] Conclusion: