Chromosome Mapping Assignment
INSTRUCTIONS
PROCEDURE A:
1) Examine the diagram of perch chromosomes supplied. They have been removed
from the nucleus of the white blood cell after replication.
2) Cut out each chromosome map of these 48 replicated chromosomes and arrange
them on the worksheet with their other pair. Place the centromere of the replicated
chromosomes on the lines of the worksheet.
3) Tape or glue down the arranged pairs in rows of 6. (Notice that a numbered
chromosome will be paired with a lettered chromosome.
4) Answer the following questions:
a) How many chromosomes are present in the spread or karyotype?
b) Which pair of the chromosomes are sex chromosomes?
c) What is the sex of this perch?
d) What is the diploid or 2n number of a yellow perch?
Yellow Perch
Chromatid
Centromere
Telomere
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Chromosome Mapping Assignment
kARYOTYPE yELLOW pERCH
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KARYOTYPE FOR YELLOW PERCH
Chromosome Mapping Assignment
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Chromosome Mapping Assignment
ANSWER KEY
PROCEDURE A:
1) Examine the diagram of perch chromosomes supplied. They have been removed
from the nucleus of the white blood cell after replication.
2) Cut out each chromosome map of these 48 replicated chromosomes and arrange
them on the worksheet with their other pair. Place the centromere of the replicated
chromosomes on the lines of the worksheet.
3) Tape or glue down the arranged pairs in rows of 6. (Notice that a numbered
chromosome will be paired with a lettered chromosome.
4) Answer the following questions:
a) How many chromosomes are present in the spread or karyotype?
48
b) Which pair of the chromosomes are sex chromosomes?
16 and I (the last pair)
c) What is the sex of this perch?
Female
d) What is the diploid or 2n number of a yellow perch?
48
Yellow Perch
Chromatid
Centromere
Telomere
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9J
24 T
10 D
4S
5M
13 O
18 U
6G
22 L
20 W
1B
15 R
7A
11 Q
16 I
23 P
3E
14 K
12 C
19 N
21 V
2H
17 X
8F
KARYOTYPE FOR YELLOW PERCH
Chromosome Mapping Assignment
ANSWER KEY
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Chromosome Mapping Assignment
iNSTRUCTIONS
PROCEDURE B:
1) Examine the diagram of perch chromosomes supplied. They have been removed
from the nucleus of the white blood cell after replication.
2) Cut out each chromosome map of these 60 replicated chromosomes and arrange
them on the worksheet with their other pair. Place the centromere of the replicated
chromosomes on the lines of the worksheet.
3) Tape or glue down the arranged pairs in rows of 6. (Notice that a numbered
chromosome will be paired with a lettered chromosome.
4) Answer the following questions:
a) How many chromosomes does this fish posses in the nuclei of its cells?
b) How many chromosomes would this fish have in its gametes or sex cells?
c) What is the sex of this fish?
d) Identify this fish by referring to the chart below which gives the chromosome
numbers of five Manitoba fishes.
Diploid Number
Manitoba Fish
Yellow Perch
Small Mouth Bass
Brown Bullhead
Walleye
Lake Trout
48
46
60
50
84
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Chromosome Mapping Assignment
kARYOTYPE FISH B
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KARYOTYPE FOR FISH B
Chromosome Mapping Assignment
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Chromosome Mapping Assignment
ANSWER KEY
PROCEDURE B:
1) Examine the diagram of perch chromosomes supplied. They have been removed
from the nucleus of the white blood cell after replication.
2) Cut out each chromosome map of these 60 replicated chromosomes and arrange
them on the worksheet with their other pair. Place the centromere of the replicated
chromosomes on the lines of the worksheet.
3) Tape or glue down the arranged pairs in rows of 6. (Notice that a numbered
chromosome will be paired with a lettered chromosome.
4) Answer the following questions:
a) How many chromosomes does this fish posses in the nuclei of its cells?
60
b) How many chromosomes would this fish have in its gametes or sex cells?
30
c) What is the sex of this fish?
Male
d) Identify this fish by referring to the chart below which gives the chromosome
numbers of five Manitoba fishes.
Diploid Number
Manitoba Fish
Yellow Perch
Small Mouth Bass
Brown Bullhead
Walleye
Lake Trout
48
46
60
50
84
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24 A
4S
29 G
10 CC
7U
1V
11 I
19P
6C
18 K
15 D
28 Z
2X
21 E
14 BB
17 T
25 O
8N
12 M
20 Y
3F
16 Q
22 H
26 L
13 AA
9R
5W
27 J
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KARYOTYPE FOR FISH B
Chromosome Mapping Assignment
ANSWER KEY
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Chromosome Mapping Assignment
INSTRUCTIONS
PROCEDURE C:
For further consideration. Compare the karyotypes of the two fishes studied in the
above procedures (A and B) with a human karyotype. How are they similar, how
are they different?
HUMAN KARYOTYPE
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Chromosome Mapping Assignment
answer key
PROCEDURE C:
For further consideration. Compare the karyotypes of the two fishes studied in the
above procedures (A and B) with a human karyotype. How are they similar, how
are they different?
The karyotypes of the fish studied are similar to a human karyotype
since they both have chromosomes that are in pairs and they undergo
meiosis. Also, the chromosomes are connected by centromeres and
both humans and fish have sex chromosomes.
The karyotypes of the fish studied are different than a human karyotype
since a they have different diploid numbers. Also, the centromeres are
in different positions.
HUMAN KARYOTYPE
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