Download Mitosis Meiosis

Meiosis: The Great
Divide
Any idea what these 23 pairs are?
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•Take turns pretending
to be reporters.
•Report to your team
the exciting happenings
at each stage of meiosis.
•Use the diagram to the
left as a visual for your
report.
Meiosis distributes genetic
material to four cells.
DNA
strand
All the instructions
needed to direct
the activities of a
cell are contained
within the chemical
DNA
Compare and contrast meiosis
and mitosis in your own words.
Include 2 differences between
these processes of cell division
and at least 1 similarity.
Mitosis is the basic process of
cell division.
Meiosis distributes genetic
material to four cells.
Cells contain a genetic code.
Meiosis or Mitosis?
 one cell division
 two divisions
 two daughter cells with
a complete set of
chromosomes
 four daughter cells with
half the genetic material
of the parent cells
 daughter cells
identical to the parent
cell
 basic cellular process
for the genetic variation
gained through sexual
reproduction
 basis for asexual
reproduction
Mitosis
Meiosis
Match the characteristic with the process.
Characteristic
Mitosis
two identical daughter cells
four different gametes as the result
egg and sperm
full set of chromosomes in
resulting cells
half the chromosomes of parent
one cell division only
Meiosis
Cell Division
Mitosis vs. Meiosis
Meiosis
“X” marks a match!
Mitosis Meiosis
Happens in
plants and animals
_____
X
Results in growth
_____
X
Makes sperm and
eggs
_____
_____
X
_____
_____
X
I’m Not in the Moooood
In order to
be able to
give milk
what has to
happen to a
cow each
year?
“When Good Cells
Go Bad…”
 Cancer is a group
of diseases where
the cells grow at an
abnormal rate.
 Name the two
tumor types.
 Identify which one
is life threatening.
Leukemia cell
Explore various links
about cell biology and
cancers.
web links
Reading:
Activity: Mitosis
Tracing
1. What is the full name of the chemical
substance represented by the letters
DNA?
2. The smallest molecules that make up
DNA are called _____.
3. Name the two pairs of nitrogen bases
that make up the ‘rungs’ of DNA.
4. What gives each person a unique DNA
code?
5. Describe two characteristics of a
gene.
6. When DNA condenses before cell
division it forms:
a. chromosomes
c. nuclei
b. chromatin
d. nucleotides
7. Write the following three terms in the
correct order for cell division by mitosis:
cytokinesis, interphase (DNA duplication), and
mitosis
.
8. Which is the correct order for the steps
of mitosis?
a. prophase, anaphase, metaphase, telophase
b. metaphase, anaphase, prophase, telophase
c. anaphase, metaphase, telophase, prophase
d. prophase, metaphase, anaphase, telophase
9. Mitosis has only _____ division step,
while meiosis has _____ divisions.
10. The result of mitosis is _____ cells
each with genetic material _____ to
the parent cell. Meiosis results in
_____ gametes, each with only _____
the genetic material of the original
cell.
Down’s syndrome, cancer, and obesity
have all been linked to a disorder where
the chromosome has a defect. Conduct
research to discover other disorders
that have been linked to genes and
chromosomes. Report your findings to
your class.
Explore various links about
mitosis, meiosis, genes and
chromosomes.
web links
State Objectives
Student Workbook
Student Workbook Key
Notes / Lesson Overview
1. deoxyribonucleic acid
2. nucleotides
3. adenine and thymine, guanine
and cytosine
4. the sequence of nucleotides
[in the DNA]
5. Accept any two reasonable answers. The
following are listed in the Student Book: basic
unit of inheritance, segment of DNA code, all
genes not the same length, markers indicate
where the gene starts and stops, and one
gene creates only one protein.
6. a. chromosomes
7. interphase (DNA replication),
mitosis, cytokinesis
8. d. prophase, metaphase,
anaphase, telophase
9. one, two