Observing The Cell Cycle Biology Worksheet Page 9
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29Investigation 10B
Modeling Mitosis and Meiosis
F
Thinking about what you observed
a. What happens to the homologous pairs of chromosomes in meiosis I?
b. At the end of meiosis I, how does the number of chromosomes in each new cell compare to
the original number of chromosomes in the parent cell? (Is it diploid or haploid?)
At the end of meiosis II, how does the number of chromosomes in each new cell compare
c.
to the original number of chromosomes in the parent cell?
G
Exploring on your own
If time permits, you can model what happens during fertilization.
1. Sketch the chart (right) onto a blank piece of paper.
2. Remove the chromosomes from a sex cell you created
during the investigation and combine this with the
chromosomes of a sex cell from a different group. This
is less complicated if you combine with a group that
has different color pipe cleaners from yours.
a. What is the end result of fertilization in terms of
chromosome number?
b. Do the cells of the new organism have a diploid or haploid
set of chromosomes?
5
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