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 / Mitosis / MeiosisOne 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
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?