AP Meiosis Sordaria

When you click Submit (at the bottom of this web page) it will save your work on the server for me.

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.


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.)

The "form handler" software doesn't like "blanks."

So, if you don't have an answer, leave the "-" or "NA" or -required- in the box.

1-Last Name:   First Name:

2-Last Name:   First Name:

Your answers will have to be perfect for a group size of 3 not to cost you in the grading. 

3-Last Name:   First Name:

No groups larger than 3 will be accepted.

Class Period  

1 2 3 4 5 6 NA

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

To answer these questions  you can

(1) do the simulated lab at lab bench http://www.biology.com The Biology Place/Lab Bench/Lab 3

(2) do the simulated lab in APLab03 in the shared folder:

To access the animations and simulations:
1-Double Click on “Shortcut to DrGottfried”  - Call me over for help accessing this in the library - THIS CAN NOT BE DONE AT HOME!
2-Double Click on APBio
3-Double Click on AP-LAB03

4-Double click on "Mitosis & Meiosis"

Go through the Tutorial (first orange ball on the upper left)

Run the lab simulations  Crossing of Sordaria Wild Type and Mutant Strains AND Viewing Crossing Over in Sordaria

(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 should 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: