1. Meiosis Cell Division to make sperm and egg cells

2. Definition Cell division by which eggs and sperm are produced.

3. Ensures that humans have the same number of chromosomes in each generation. 46

4. It is a two-step process that reduces the chromosome number by half— from 46 to 23 to form sperm and egg cells.

5. When the sperm and egg cells join at fertilization, each contributes 23 chromosomes so the resulting embryo will have the usual 46. 23 46

6. Meiosis also allows genetic variation through a process of DNA shuffling while the cells are dividing.

7. Launch the Cells Divide Interactive http://www.pbs.org/wgbh/nova/body/how- cells-divide.htmlhttp://www.pbs.org/wgbh/nova/body/how- cells-divide.html Look for the 4 main differences between mitosis and meiosis

8. http://post.queensu.ca/