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Unit 2: Cellular Processes
Mitosis Homework
Period #
September 14, 2009
Answer the following review questions from Friday’s lesson:
1. What does DNA do?
2. What are chromosomes? What do they look like?
3. Normally, somatic cells have __________ pairs of chromosomes, making __________ total.
4. N = the number of copies of each chromosome in a cell. Normally, somatic cells are _________ N.
5. During cell division, somatic cells are __________N, which means they have __________ copies
of each chromosome.
Below is a picture of prophase, metaphase, anaphase, and telophase. The stages are not in the
right order. Which letter corresponds to which stage?
5. Picture “A” is of ________________________.
6. Picture “B” is of ________________________.
7. Picture “C” is of ________________________.
8. Picture “D” is of ________________________.
In one sentence each, describe ALL FIVE stages of mitosis in their proper order below:
Answer the following questions.
9. How many chromosomes do human somatic cells have at the BEGINNING of interphase?
a. 1N
b. 2N
c. 4N
d. 8N
10. How many chromosomes do human somatic cells have at the END of interphase?
a. 1N
b. 2N
c. 4N
d. 8N
11. How many chromosomes do human somatic cells have during prophase, metaphase,
anaphase, and telophase?
a. 1N
b. 2N
c. 4N
d. 8N
12. Describe the phase of mitosis that occurs after chromosomes line up in the middle of the
cell.
Synthesis! If you really understand what’s going on, you should be able to put it together:
13. An octopus somatic cell has a pair of 36 different types of chromosomes.
a. How many chromosomes does an octopus somatic cell have total? _____________.
b. Because octopus somatic cells have a pair of each chromosome, they are
______________ N.
c. Before an octopus somatic cell can divide, it must copy its DNA. When this happens,
it has ______________ pairs of chromosomes, and is ______________ N.