Name:___________________________________ Date:______________ Period:_____
Mitosis and Meiosis review. http://biologyinmotion.com/cell_division/index.html
Practice dragging chromosomes or sister chromatids to the correct cell. Be sure to READ THE
DIRECTIONS before starting. (easy)
1. Explain why it's important to keep the chromatids of each chromosome pair apart when the
new cells are forming. (In other words, why doesn't a pair of chromosomes end up together in a
daughter cell?)
Journey into DNA. http://www.pbs.org/wgbh/nova/genome/dna.html
This NOVA site gives you a tour of the DNA in your body. Click on the right of the screen on
"go to 'Journey into DNA' ". Use the + magnifying glass to move through the tutorial. Read
every slide, and answer the questions below on your paper. (intermediate)
1. Which cells have no nucleus?
2. About how many cells are there in a human body?
3. What helps produce new kinds of cells?
4. How many sets of chromosomes do humans have?
5. How many total chromosomes do humans have?
6. What percentage (%) of the human genome doesn't code for any proteins?
7. How big can a single gene be?
8. About how long is the DNA in a single cell?
9. What are histones?
10. Who were the three individuals credited with developing a model of DNA
11. What are the names of the four nucleotides that make up DNA
12. What are the three components of a nucleotide?
13. How many atoms make up a single nucleotide?
14. About how many nucleotides are there in the human genome?