Date ________
Meiosis Web Activity
Name ___________________
Visit this website:
http://www.sumanasinc.com/webcontent/anisamples/majorsbiology/meiosis.html
1. Read through the introduction information.
2. Select the “Animation” tab.
3. Select “Step through” so that you can fill in the chart below. Follow the prompts to watch each
step and read its explanation.
4. When you get to the end, select the “Conclusion” tab. Read it through, then write your own
summary of the purposes of Meiosis in the space provided.
Phase
Interphase
Diagram
What is happening
1. What happens to the DNA during interphase?
2. Is the DNA visible during this phase?
3. Are chromosomes now visible? _______
Prophase I
Early - Middle
4. What structure is formed from the
centrosomes (same thing as centrioles)?
5. This diploid cell contains ________________
chromosomes, which pair up later in
Prophase I.
6. What begins to happen to the nuclear
envelope and nucleolus?
7. What happens during crossing over?
Prophase I
Late
8. Where do the pairs of chromosomes line up?
Metaphase I
9. What does it mean when they say the
chromosomes assort independently?
Date ________
Anaphase I
Meiosis Web Activity
Name ___________________
10. Where do the chromosomes move to during
Anaphase I?
11. Why might the sister chromatids no longer
be identical?
Telophase I
12. During this phase chromosomes
__________, nuclear membranes
__________, and cytoplasm _________,
in a process known as __________.
13. Does DNA replication occur during
interkinesis (the second interphase)?
Prophase II
14. In Prophase II are the cells haploid or
diploid? _________
15. How many chromatids are contained in each
chromosome?
Metaphase II
16. Where in the cell do the chromosomes line
up in Metaphase II?
17. How is Metaphase II different from
Metaphase I?
Anaphase II
18. During Anaphase II both chromatids become
independent __________ and move to
_____________ _________ of the cell.
Telophase II
19. During Telophase II the ____________
decondense, and the nuclear membrane
_________.
20. Looking at the Telophase II diagram, how
many cells are formed? _________
Date ________
Meiosis Web Activity
Name ___________________
Click on the Quiz tab.
1. With respect to meiosis, when does DNA replication occur? ____________________
2. When does crossing over occur? ____________________
3. During which phase do chromosomes line up along the equator? ____________________
4. During which phase does the nuclear membrane form around the chromosomes? ______________
Comparison of Mitosis and Meiosis
Go to http://www.pbs.org/wgbh/nova/baby/ and click on "Mitosis vs. Meiosis"
After viewing the animation, fill out the chart below, by placing a check in the box or boxes to indicate
which the event occurs in (some events might have checks for both mitosis and meiosis).
Mitosis
Meiosis
Mitosis
Two cell divisions
Chromosomes pair up
Centrioles appear
Produces 2 identical cells
Spindle fibers form
Begins with diploid cell
Four daughter cells
Crossing over occurs
Cytokinesis
Produces haploid cells
Meiosis