6.1 Meiosis
Name: ______________________________
1. Determine whether the event described is occurring in meiosis I or meiosis II.
Meiosis I or Meiosis II
Event in Meiosis
a. Individual chromosomes move to the equator.
b. Homologous pairs of chromosomes move together to the equator.
c. Crossing over occurs.
d. Homologous chromosomes move to opposite poles.
e. Centromeres divide.
2. What are the benefits of genetic diversity?
3. Complete the table comparing mitosis and meiosis.
Question
Mitosis
Meiosis
a. Where does it take place
(ie. what type of cells)?
b. How many cells are
produced?
c. What happens to the number
of chromosomes
d. Do parent and daughter cells
differ genetically? Explain.
e. How do daughter cells
compare to each other
genetically?
Science 9 ● Biology● Assignment
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4. List the four types of chromosome mutations. Include a drawing for each.
1.
2.
3.
4.
5. Whole chromosomes can be lost or added during meiosis. Explain how this can occur.
6. State whether the description is related to internal fertilization, external fertilization or
both.
Internal, External or Both
Description
a. Energy is required to find a mate.
b. Embryos are unprotected.
c. Large numbers of embryos are produced.
d. Embryos are not genetically identical to parents.
e. Centromeres divide.
7. How do the crossing over and independent assortment result in genetic variation?
Crossing Over
Science 9 ● Biology● Assignment
Independent Assortment
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8. Explain how to determine whether a sperm cell is in meiosis I or meiosis II?
9. The body cell of a dog has 76 chromosomes. Complete the table.
a. How many pairs of homologous chromosomes does it have?
b. How many chromosomes would be in each egg cell?
c. How many chromosomes would be in a brain cell of a dog?
d. What is the diploid number for a dog?
e. What is the haploid number for a dog?
f. How many chromosomes would there be in meiosis I, immediately after DNA replication?
10. What stage of the cell cycle would be best to use for karyotyping? Explain.
Science 9 ● Biology● Assignment
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