Download MEIOSIS COMPREHENSION CHECK - Parkway C-2

MEIOSIS COMPREHENSION CHECK
Materials:
a) 15 cells each represented by a large note card
b) Glue
c) One background sheet on which to glue the notecards
d) An envelope containing 17 pieces of four different colors of yarn each.
If your teacher counted correctly, all pieces of yarn will be used by the end of the activity.
1. The parent cell (the one that will go through mitosis) has 4 chromosomes, one of each of the
colors
2. Using your note cards and yarn, make a model of the different cells
a) the parent cell
b) the same cell in Prophase I
c)
“
Metaphase I
d)
“
Anaphase I
e)
“
Telophase I
f)
“
Prophase II
g)
“
Metaphase II
h)
“
Anaphase II
i)
“
Telophase II
Label each card with the correct name that it represents
Remember, the goal of meiosis is to end up with four cells having half of the number of
chromosomes as the parent cell.
3. On your model show crossing over
4. Use a pencil or pen to indicate if a nuclear membrane Is around the “yarn” chromosomes.
Remember, the nuclear membrane is not always present in the cell so as to allow for
chromosome movement.
5. Sketch in the presence of spindle fibers if present during a stage of meiosis.
6. Next to each “cell” write a description of what is occurring at that stage
WHEN FINISHED, CALL THE TEACHER TO YOUR GROUP
_________________
Name ________________________________
Meiosis Lab
Date ___________________ Per. _________
Question: What do the different stages of meiosis look like?
Research:
1. What is the difference between haploid and diploid? ____________________________________________________
__________________________________________________________________________________________________
2. What is the purpose of meiosis? _____________________________________________________________________
__________________________________________________________________________________________________
3. True or False. DNA replication occurs during meiosis. ____________________________________________________
4. What is a tetrad? _________________________________________________________________________________
__________________________________________________________________________________________________
5. Describe crossing-over. _________________________________________________________________________
__________________________________________________________________________________________________
6. What are the principal differences between mitosis and meiosis? __________________________________________
__________________________________________________________________________________________________
__________________________________________________________________________________________________
Prediction: _______________________________________________________________________________________
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Observations:
Place a Lilium anthers, 1st meiotic div, slide and focus under high power. Diagram these two stages:
Metaphase I
Anaphase I
Place a Lily Anthers, second division, slide and focus under high power. Diagram these two stages:
Metaphase II
Anaphase II
Did you observe a difference in the “number” of chromosomes between your first diagrams and your second?
__________________________________________________________________________________________________
Analysis & Conclusion
1. If a somatic, body, cell contains 46 chromosomes. Would this cell be considered diploid or haploid? _____________
2. How many chromosomes would a human haploid cell contain? ____________________________________________
3. Where in the body does meiosis occur? _______________________________________________________________
__________________________________________________________________________________________________
4. When an egg is fertilized, is the new cell haploid or diploid? _______________________________________________
How many chromosomes does it contain? _______________________________________________________________
5. If an organism has 6 total chromosomes in each somatic cell, how many pairs of homologous chromosomes does it
have?_____________________________________________________________________________________________
6. How many possible combinations of chromosomes are there in its gametes? _________________________________
Show your Work
7. How many possible combinations are there in a human gamete? ___________________________________________
Show your Work
8. What is the significance of crossing over? ______________________________________________________________
__________________________________________________________________________________________________
9. A dog is 2N=78. How many are in its gametes? _________________________________________________________
10. A cabbage has 18 chromosomes for its diploid number. How many are in its gametes? ________________________
11.
Mitosis
Meiosis I
Meiosis II
Where it occurs
(Type of cells)
Prophase
Metaphase
Anaphase
Telophase
12. How does meiosis lead to genetic variation? __________________________________________________________
__________________________________________________________________________________________________
13. How would the gametes be affected if a pair of chromatids failed to separate in the second meiotic division? ______
__________________________________________________________________________________________________
14. What parts of the cell did the yarn represent? _________________________________________________________