Name: _______________
Mitosis and Meiosis Online Lab
Period:____________
Answer the following questions using the provided links.
1. Click here http://www.pbs.org/wgbh/nova/baby/divi_flash.html
2. How many steps to complete Mitosis? ___________ Meiosis? ___________
3. Go to the last step in Meiosis. What does it say about “daughter cells”?
___________________________________________________________________________________________________
___________________________________________________________________________________________________
Recently in the media news there has been a lot of discussion about “stem cells”. Click here
http://www.dnalc.org/stemcells.html
4. What is a blastocyst? How many cells does it have?_______________________________________
On the next slide what does it say about the potential of stem cells?_______________________________
___________________________________________________________________________________________________
Where are the cells placed to develop? ___________________________________________________
5. Look at the last slide. What do they hope these cells can be used for?
___________________________________________________________________________________________________
___________________________________________________________________________________________________
Here is another picture of a blastocyst the pink cells are the stem cells.
6. Where is the blastocyst located?
___________________________________________________________________________________________________
This shows you how big it is. Compare the stem cell to the dime. (Here are some real ones!)
Look at the following about cancer; http://www.pbs.org/wgbh/nova/cancer/grow_flash.html
On
the second to last slide it talks about why cancer cells are so dangerous.
7. What does “metastasize" mean?___________________________________________________
8. And why is it so dangerous? _____________________________________________________
___________________________________________________________________________________________________
9. What is Meiosis?______________________________________________________________
Use this RESOURCE to browse through each part.
Part 1: Reproduction
Give an example of asexual reproduction.__________________________________________
What is a clone? _____________________________________________________________
Name the two types of gametes produced by meiosis._________________________________
Part 2: Chromosomes in a Diploid Cell
What is the diploid chromosome number for humans? __________________________________
Egg and sperm cells are [ haploid / diploid ] Circle one
Part 3: Meiosis 1 and Meiosis 2
Name the stage of meiosis 1 where each of the following occurs:
Homologous chromosomes pair and form synapses
_______________________________________
Paired Chromosomes (bivalents) align at metaphase
plate
_______________________________________
Two complete daughter cells form
_______________________________________
Nuclear membrane disappears.
_______________________________________
Nuclear membrane reforms.
_______________________________________
Chromosomes move to separate poles.
_______________________________________
View the meiosis 1 and 2 animation
At the end of meiosis 2, each cell contains how many chromosomes? ___________
Part 4: A Review of Meiosis
Name and describe 2 errors that can occur during meiosis.
______________________________________________________________________
______________________________________________________________________
______ ________________________________________________________________
Check out the following videos: Meiosis
Conclusion
10. Describe the differences between daughter cells produced by meiosis and daughter cells
produced by mitosis.
_______________________________________________________________________________________________
_______________________________________________________________________________________________
_______________________________________________________________________________________________
11. Review the diagram, and fill in the correct number of chromosomes per human cell in each
blank.
Mother _____
Meiosis ↓
egg _____
Father _____
Meiosis ↓
sperm _____
Fertilization
zygote _____
Mitosis ↓
Embryo _____
Mitosis ↓
baby _____
12. How many chromosomes are there in a human skin cell produced by mitosis? ________
How many chromosomes are there in a human sperm cell produced by meiosis? _______
13. List 2 differences between mitosis and meiosis.
__________________________________________________________________________________
14. List 2 similarities between mitosis and meiosis?
__________________________________________________________________________________
Reinforce the concept of mitosis and meiosis by using the many animations and videos shown
on the Cell Division homepage.