Name ______________________________
Date _____________
Cell Division: Meiosis
___________________1.
___________________7.
In this type of reproduction, the parent passes ALL of its DNA down to the
offspring.
Name given to a pair of structurally similar chromosomes that possess genes for
the same characteristics at the same loci.
If a sexually reproducing organism has a chromosome number of 2N = 18, how
many chromosomes will be found in each of the body cells of this organism?
If a sexually reproducing organism has a chromosome number of 2N = 18, how
many chromosomes will be found in the sex cells of this organism?
What type of cell division results in cells that have half the number of
chromosomes as the original cell?
In this type of reproduction, the parent passes down only half of its DNA to the
offspring.
Term that means that a cell has one of each kind of chromosome.
___________________8.
During which stage of meiosis are tetrads formed?
___________________9.
List three advantages to asexual reproduction.
___________________2.
___________________3.
___________________4.
___________________5.
___________________6.
__________________10.
__________________11.
__________________12.
What term is used to describe the sex cells (egg and sperm cells)?
__________________13.
During which stage of meiosis do tetrads line up at the center of the cell?
__________________14.
During which stage of meiosis do sister chromatids line up at the center of the cell?
__________________15.
During anaphase I ______ are pulled apart.
__________________16.
During anaphase II ______ are pulled apart.
__________________17.
What is the advantage of sexual reproduction?
__________________18.
Term that means that a cell has two of each kind of chromosome.
__________________19.
What is the symbol for diploid?
__________________20.
What is the symbol for haploid?
__________________21.
The exchange of genes between segments of homologous chromosomes during
meiosis.
Compare mitosis with meiosis by filling in the chart below:
Characteristic
Mitosis
Meiosis
22. In what type of cells does this type of cell division
occur?
23. How many cells are formed at the end of the
process?
24. Are the resulting daughter cells the same or different
than the mother cell?
25. If the process begins with a diploid mother cell, will
the daughter cells be haploid or diploid?
26. Are tetrads formed?
27. Does crossing over occur?
28.
What is synapsis and crossing over? What is the importance of this event? _______________________
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Teacher Answer Key:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
asexual
homologous chromosomes
18
9
meiosis
sexual
haploid
prophase I
The parent does not have to find a mate.
Many offspring can be produced.
The process occurs very quickly.
gametes
metaphase I
metaphase II
tetrads
sister chromatids
variation in the offspring
diploid
2N
1N
crossing over
Characteristic
Mitosis
Meiosis
22. In what type of cells does this type of cell
division occur?
23. How many cells are formed at the end of the
process?
24. Are the resulting daughter cells the same or
different than the mother cell?
25. If the process begins with a diploid mother cell,
will the daughter cells be haploid or diploid?
26. Are tetrads formed?
Body Cells
Sex Cells
2
4
Same
Different
2N
1N
No
Yes
27. Does crossing over occur?
No
Yes
28.
Synapsis is the pairing of homologous chromosomes. This occurs during prophase I of meiosis and does
not occur during mitosis. When homologous chromosomes are paired together in tetrads, crossing over
may occur. Portions of chromatids may break off and attach to adjacent chromatids. This process permits
the exchange of genetic material between maternal and paternal chromosomes. It results in genetic
recombination and produces a new mixture of genetic material.