Genetics: Mitosis & Meiosis
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I. INTRODUCTION
List the 3 types of cell division.
TEACHER’S GUIDE
Why do organisms need new cells?
What is chromatin?
What are chromosomes and how many do humans have?
What is the cell cycle and what are the two main phases that it includes?
List and briefly describe each of the 3 parts of Interphase.
Label the diagram of the chromosome.
II. MITOSIS
What happens during the mitotic phase?
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1.B
List the two parts of cell division.
Define mitosis.
Define cytokinesis.
Complete the table with the major events for each stage of mitosis.
Stage
Prophase
Metaphase
Anaphase
Telophase
Major
Events of
Phase
What happens during cytokinesis and when does it occur?
Compare and contrast cytokinesis in animal cells with cytokinesis in plant cells. You may do this with a
drawing, if you prefer.
How do the end products of mitosis compare to the original parent cell?
III. MEIOSIS
Define meiosis.
Where does meiosis occur?
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2.B
What cells are produced by meiosis in the testes? The ovaries?
How are sperm and egg cells, also called ___________________ different from other cells?
Explain chromosome pairs.
Describe the cells produced by meiosis.
Humans have 46 chromosomes, so after DNA synthesis there are _____ chromosomes in the cell.
After the first division there are two cells that each have _____ chromosomes.
After the second division there are four cells with _____ chromosomes each.
What does a karyotype show?
Define homologous chromosomes.
How are homologous chromosomes similar? How are they different?
Give an example of “different versions of a gene”.
Define diploid. Which cells are diploid?
Define haploid. Which cells are haploid?
Define fertilization.
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3.B
Define zygote.
Diploid organisms form _________________________ through ____________________ AND
_________________________ form _________________________ through the process of
____________________.
In general, how does meiosis produce four haploid cells?
What are the names of the two cytoplasmic divisions that occur during meiosis?
How do the end products of meiosis compare to the original parent cell?
Complete the table below with events for each phase of Meiosis I and Meiosis II
MEIOSIS I
MEIOSIS II
Prophase I
Prophase II
Metaphase I
Metaphase II
Anaphase I
Anaphase II
Telophase I
Telophase II
Result of Meiosis
I
Result of Meiosis II
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4.B
What do you notice about sister chromatids in Prophase II?
Describe the chromosome separation that occurs during Meiosis I?
Describe the chromosome separation that occurs during Meiosis II?
If an organism has 2 sets of homologous chromosomes, how many possible gametes can it produce from each
cell that undergoes meiosis?
How many possible chromosome combinations could a human produce in his/her gametes?
Define crossing over.
When can crossing over occur?
How does crossing over increase genetic variation?
List more details about when and where crossing over can occur.
Complete a Venn Diagram to compare Mitosis and Meiosis.
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