Name: ________________________________________  Date: ___________________

 

Meiosis Computer Activity

 

Go to the URL:

http://www.sumanasinc.com/webcontent/anisamples/majorsbiology/independentassortment.html

 

Read the introduction then click on the animation tab. You may choose to have the animation narrated or step-through. If you choose the step-through, donít forget to click on the play button and continue button to see the animation. Answer the following questions:

 

  1. What is the symbol that represents a diploid cell?

 

 

  1. How many pairs of chromosomes are in the example in this animation?

 

 

  1. Explain why the homologous pairs are not quite identical.

 

 

  1. Describe alignment #1.

 

 

  1. Describe alignment #2.

 

 

  1. What is the symbol that represents a haploid cell?

 

 

  1. What are the four possible genotypes of the gametes that result from independent assortment during meiosis?

 

 

  1. When donít genes assort independently?

 

 

 

Click on the conclusion tab and read the conclusion.  Answer the following questions.

 

  1. When genes are on the same chromosome, they are said to be _______________?

 

 

  1. What has to be true for genes to assort independently?

 

  1. How is it possible for linked genes to assort independently?

 

 

 

Click on the quiz tab and take the quiz.

 

Go to the URL: http://www.sumanasinc.com/webcontent/anisamples/majorsbiology/meiosis.html

 

Read the introduction then click on the animation tab. You may choose to have the animation narrated or step-through. If you choose the step-through, donít forget to click on the play button and continue button to see the animation. Answer the following questions:

 

  1. When during the cell cycle does replication occur?

 

 

  1. How many cell divisions occur in meiosis?

 

 

  1. What is the pairing of homologous chromosomes during Prophase I called?

 

 

  1. What is meant by crossing-over?

 

 

  1. What happens to the homologous chromosomes during Metaphase I?

 

 

  1. What is meant by the chromosomes assort independently?

 

 

  1. What happens to the centromeres just before Anaphase I?

 

 

  1. What does NOT take place during interkinesis?

 

 

  1. What is the term used to describe the cellís chromosome number during Prophase II?

 

 

  1. How is Metaphase II different from Metaphase I?

 

 

  1. What happens to the centromeres just before Anaphase II?

 

  1. How many cells form at the end of Telophase II?

 

 

 

Click on the conclusion tab and read the conclusion.  Answer the following questions.

 

  1. Name the two processes that contribute to the genetic uniqueness of the gametes produced during meiosis.

 

 

 

Click on the quiz tab and take the quiz.

 

Go to the URL:

http://www.pbs.org/wgbh/nova/baby/divi_flash.html

 

Read ďHow Cells DivideĒ. Move through the animation by clicking on the next button and answer the following questions:

 

1.      How many chromosomes does a normal human have?

 

 

2.      How many chromosomes are used in this animation?

 

 

3.      What is the result of mitosis in terms of number of cells and number of chromosomes?

 

 

4.      What is the result of meiosis in terms of number of cells and number of chromosomes?

 

 

5.      What important event happens during interphase before both mitosis and meiosis?

 

 

6.      What letter of the alphabet do the chromosomes look like during Prophase of mitosis?

 

 

7.      How are the chromosomes different during Prophase I of meiosis from Prophase of mitosis?

 

 

8.      What happens to the chromosomes while they are paired up during Prophase I of meiosis?

 

 

9.      How is Metaphase I of meiosis different from Metaphase of mitosis?

 

 

10.  What separates during Anaphase of mitosis?

 

 

11.  What separates during Anaphase I of meiosis?

 

 

12.  How many cells are made at the end of mitosis?

 

 

13.  How many chromosomes does each of the cells have at the end of mitosis?

 

 

14.  How is cytokinesis (the cell dividing) in Telophase I of meiosis different for males and females?

 

 

15.  What important process does not happen during Interphase II of meiosis?

 

 

16.  What important process does not happen during Prophase II that did happen during Prophase I?

 

 

17.  What separates during Anaphase II of meiosis?

 

 

18.  How many cells are made at the end of meiosis?

 

 

19.  How many chromosomes does each of the cells have at the end of meiosis?

 

Click on the URL:

http://biologyinmotion.com/cell_division/

 

Practice the mitosis activity and the meiosis activity.