Lab Report: Meiosis
Part 1
Directions: First, review mitosis by labeling the phases of the cells in the
onion root picture below. Put your answers in the table below the image of
the cells.
Picture
Number
1
2
3
4
5
6
7
8
9
Phase of
Mitosis
Picture
Number
10
11
12
13
14
15
16
17
18
Phase of
Mitosis
Part 2
Directions: Review meiosis by reading the material in the lessons and view
the links below to compare mitosis and meiosis. The two sites that provide
animations of meiosis are:
Cells Alive!: Animal Cell Meiosis
Tutorial: Meiosis
The following site compares the two processes:
What is Mitosis/Meiosis?
Complete the chart of differences between mitosis and meiosis using the
bank of phrases below. Insert the corresponding letter in each box. You will
only use each letter once.
Mitosis
Meiosis
Begins with/Ends with:
Occurs in:
Results in:
Type of reproduction
Function
Phrase bank for the chart above
Answer
Option
A
Type of reproduction in which the number of chromosomes are
reduced 50% to allow for transmission of the genes to offspring.
B
Growth, replacing of old cells, asexual reproduction.
C
Cellular Reproduction, regeneration of the individual organism.
D
One diploid cell; two diploid cells.
E
Human, animals, plants.
F
Sexual Reproduction, Seeds.
G
A process of asexual reproduction in which the cell divides in two
producing a replica with an equal number of chromosomes.
H
One diploid cell; four haploid cells.
I
Biological Reproduction, generation of the species.
J
Human, animals, single cell species, others.
Part 3: Phases of Meiosis
Directions: Fill in the chart using the diagram below. You will put your
answer in the column titled, “Name of Phase.” Use each phase of meiosis
once for the: prophase I, prophase II, metaphase I, metaphase II, anaphase
I, anaphase II, telophase I, telophase II.
Number on
Diagram
1
2
3
4
5
6
Name of Phase
Description
A new spindle forms around the
chromosomes.
Spindle fibers move homologous
chromosomes to opposite sides or
poles of the cell.
Nuclear membrane reforms,
cytoplasm divides, 4 daughter cells
formed
Chromosomes line up along equator
(not in homologous pairs)
Chromosomes become visible. The
nuclear envelope breaks down.
Crossing-over occurs.
Centromeres divide. Chromatids move
to opposite poles of the cell.
7
Pairs of homologous chromosomes
move to the equator of the cell.
Chromosomes gather at the poles.
Cytoplasm divides, 2 daughter cells
are formed.
8
Diagram and chart above are from http://www.biologycorner.com/worksheets/meiosis2.html
Part 4
Directions: Refer to the diagram below to answer the three questions.
Questions:
1. A diploid cell in the male (spermatocyte) undergoes meiosis I and II and
produces how many sperm?
2. A diploid cell in the female (oocyte) undergoes meiosis I and II and
produces how many eggs? Be careful. Four cells result, but they combine
to form how many eggs?
3. Which cell is larger, the egg or the sperm cell?