2) What Is the Definition of Fertilization?

Meiosis Tutorial

Directions: Go to the website: http://www.biology.arizona.edu/cell_bio/tutorials/meiosis/main.html . Go through the meiosis tutorial and answer the questions below using complete sentences.

1) Click on the Reproduction Link on the Main Home Page. It can be found under the Contents column. Asexual reproduction takes place with what process? What is produced at the end?

2) What is the definition of fertilization?

3) Eggs and sperm are haploid. What does this mean?

4) What is another word for an egg or sperm?

5) When a sperm and egg join, a zygote forms. How many sets of chromosomes does this zygote contain? Why?

6) Click on the Next Link at the bottom of the page. 2n means we have 2 sets of chromosomes, one from mom and one from dad. In total, how many do we have?

7) Autosomes are chromosomes that are not sex chromosomes. How many do we humans have?

8) The 23rd chromosomes are called the sex chromosomes. What are the sex chromosomes for a male? A female?

9) What is a karyotype?

10) What cells in your body are diploid? What cells in your body are haploid?

11) Click on the Next Link at the bottom of the page. What is produced at the end of meiosis? 12) Describe briefly each step of Meiosis I:

-Prophase I

-Prometaphase I

-Metaphase I -Anaphase I

-Telophase I

-Cytokinesis

13) View the Meiosis I animation. Summarize what you observe.

14) What happens during Meiosis II?

15) Click on the Next Link at the bottom of the page. Compare mitosis and meiosis. Write down a few differences.

16) What is nondisjunction?

17) What is Trisomy 21? Do some independent research on this. Who is most likely to get this disease? What are the symptoms?

18) What are Turner and Klinefelter Syndromes?

19) Click on the Next Link at the bottom of the page. Take the Quiz. Write the correct answers below (don’t just put letter B, write out the answer!)

1. 2. 3. 4. 5. 6. 7. 8. 9. 10.