Genetics and cell division

Today we'r going to keep looking at DNA and cell division as we have been in class. Complete the following in your book:

1. Complete this activity,  explaining what the two types of reproduction are. Which increases variation in a population?
2. From the activity above, what process creates gametes?
3. Watch this animation about mitosis and meiosis, then give one similarity and one difference between the two.
4. How many gametes are produced from one parent cell in meiosis?
5. What is crossing over? When and why does it occur?
6. Use this interactive site to help you define the following: chromatids, homologs. Once you've done that, complete the quiz to test your knowledge.
7. Use the picture to explain how many pairs of chromosomes humans have. Why is one pair different lengths sometimes?                                               
8. Watch the video below, and use it to help you write a definition for 'haploid' cells:

Finally, try this activity. What are the round things that sort out randomly representing? HOW are they randomly assigned to a gamete? (This happens in two different ways).