NAME:__________________________________________DATE:__________ HOUR:_______
MEIOSIS INTERNET LAB
Internet Activity #1
http://www.lpscience.fatcow.com/jwanamaker/animations/meiosis.html
** Note: It is sometimes easier to google Lewport Meiosis page.
1.
How many chromosomes does the cell in this animation start with?
2.
The homologous chromosomes are represented by similar ________________________.
3.
Copies of chromosomes are held together by the ________________________________.
4.
Each chromosome finds its _________________________________________________.
5.
Using colored pencils, draw crossing over.
6.
How many chromosomes are at each pole of the cell?
7.
During Meiosis II, chromosomes line up again along the cell’s _______________________.
8.
Only _________ copy of each chromosome moves towards the poles.
9.
New membranes form around each __________________________________.
10.
Each cell divides, forming a total of _______________ cells.
Internet Activity #2
www.sumanasinc.com/webcontent/anisamples/majorsbiology/
Click on “General Biology” and then click on Meiosis
___________
________________
11.
Explain the difference between the cells that begin the process of meiosis to the cells, which
are the final product of meiosis.
Click on “Step-Through” and answer the following questions.
12.
When does DNA replication take place? ______________________________________
13.
Meiosis consists of two cell divisions: ______________________ & ___________________
14.
Centrosomes (aka centrioles) migrate to ________________________________________.
15.
The pairing of homologous chromosomes is called _________________________________.
16.
Crossing over points are called ________________________________________.
17.
What happens in metaphase I? __________________________________________________
18.
What happens in anaphase I? ___________________________________________________
19.
What is interkinesis? _________________________________________________________
20.
In prophase II, are the cells diploid or haploid? _______________________
21.
What organelle divides in anaphase II? __________________________________
22.
What happens in telophase II? _________________________________________________
23.
Read the conclusion. Describe the genetic makeup of each of the four daughter cells
produced by meiosis. ______________________________________
Click on “Check Your Understanding”. Take the quiz and answer the following questions.
24.
With respect to meiosis, when does DNA replication occur? _________________________
25.
When does crossing-over occur? ______________________________________
26.
During which phase do chromosomes ling up along the equator? _______________________
27.
During which phase does the nuclear membrane form around the chromosomes?
_____________________________
Internet Activity #3
www.biologyinmotion.com
Click on “Cell Division Exercise”. Click on “Practice Meiosis”.
28.
There are two ways in which the chromosomes can be separated in this meiosis activity. Use
your colored pencils and sketch the two different chromosomal products of this activity.
**Note: Use the following colored pencils/crayons – Light purple, dark purple, light green,
dark green
Option #1
Option #2
Internet Activity #4
www.pbs.org/wgbh/nova/baby/
Click on “How Cells Divide”. Click on “Launch Interactive”.
Mitosis vs. Meiosis
One cell division
Two cell divisions
Chromosomes pair up
Spindle fibers form
Centromeres do not divide in metaphase
Centrioles appears
Two daughter cells
Four daughter cells
Mitosis
Meiosis
Internet Activity #5
www.cellsalive.com
Click on “Meiosis”. Click on “Start the Animation”.
Watch the animation and read the descriptions under the animations. Answer the questions below.
29.
The process of meiosis begins with a ____________________________ cell.
30.
Identify the following phases of meiosis based up on the descriptions below. Make sure to
identify whether the phase is a part of Meiosis I or Meiosis II by placing a I or a II after the
name of the phase.
A.
_____________________________ Tension from the spindle fibers align the tetrads at the
equator.
B.
_____________________________ Spindle formation begins and the centrosomes begin
moving toward the poles.
C.
_____________________________ Tetrads are created. Crossing-over occurs.
D.
_____________________________ Cleavage furrow forms beginning the process of
Cytokinesis I.
E.
_____________________________ Chromatids separate and begin moving to the poles.
F.
_____________________________ Tension from spindle fibers align chromosomes at the
metaphase plate.
G.
_____________________________ Chiasmata break apart and sister chromatids begin
migrating toward opposite poles.
H.
_____________________________ Cleavage furrow forms beginning the process of
Cytokinesis II.
Instructional Notes: Meiosis Computer Activity
Pre-activity Discussion
Discuss what is known about meiosis following the mitosis and meiosis comparison activity.
Activity Performance Notes
Five websites will utilized, questions to answer while the students work are also included.
http://www.lpscience.fatcow.com/jwanamaker/animations/meiosis.html
www.sumanasinc.com/webcontent/anisamples/majorsbiology/
www.biologyinmotion.com
www.pbs.org/wgbh/nova/baby/
www.cellsalive.com
Post-activity Discussion
What is the outcome of meiosis?
What are the similarities and the differences between mitosis and meiosis?
Why are mitosis and meiosis similar?