Biol 101 Mitosis and Meiosis Study Guide
This will not be collected, and you are encouraged to work with classmates
It is not intended to cover all topics covered in this section.
1. The following diagrams show the chromosomes of two different organisms as they appear
during prophase. What is the diploid chromosome number of each species?
_________
__________
Cell cycle
G1, S, G2, M
Mitosis
Prophase
Metaphase
Anaphase
Telophase
Meiosis
Prophase-I
Metaphase-I
2. In which stage(s) of the cell cycle, mitosis or meiosis (shown to the right)
Anaphase-I
do each of these processes occur (multiple stages apply to some)
Telophase-I
A. Crossing-over: __________________________________________
Interkinesis
B. Chromosome supercoiling: _________________________________
Prophase-II
C. Separation of sister chromatids: _____________________________
Metaphase-II
D. DNA synthesis: __________________________________________
Anaphase-II
E. Chromosome reduction from 2N to N: ________________________
Telophase-II
F. Formation of bivalents: ____________________________________
3. Draw a diagram that shows the appearance of a cell (2N=4) and the arrangement of the
chromosomes during these stages (be sure to draw chromosomes and spindle clearly):
Metaphase
Metaphase-I
4. If a cell has a chromosome number of 2N = 10:
How many pairs of homologous chromosomes does it possess? _____
What is the total number of sister chromatids in the cell during:
Prophase
_____
Prophase-I
_____
Prophase-II _____
How many chromosomes will be in the daughter cells after:
Mitosis
_____
Meiosis
_____
Metaphase-II
5. Complete the following table. A single value is given for each of five species (A-E); fill in the
rest of the values for each species. However: one value is not possible!
Chromosome #s in each species
Species A
N:
2N:
# pairs of
homologous C’somes:
# sister chromatids
during prophase:
Species B
Species C
Species D
Species E
4
6
8
10
# of bivalents
during meiosis:
12
# sister chromatids
during metaphase-II:
The value for which species is not possible? ______ Explain why:
6. Describe three ways in which genetic diversity is generated during meiosis and sexual
reproduction:
1.
2.
3.
7. Explain why chromosome reduction is said to occur during anaphase-I rather than anaphase-II: