Meiosis – Online Simulations
In this investigation, you will view sites that illustrate the process of meiosis. For each site answer the
questions associated. Remember that url's must be typed in exactly as they appear.
Site 1 – Wiley College
Go to-Meiosis Basics. Click on show narrative.
1. What is the process called when cells divide to produce exactly identical daughter cells (clones) for
growth and repair?
2. What type of cell division allows sexual reproduction?
3. In humans, where does meiosis occur (which organs)?
4. Each parent contributes how many chromosomes to his or her offspring?
5. Of the 46 chromosomes in a somatic (body) cell of a human, how many came from the mother’s
egg cell? How many came from the father’s sperm cell?
6. Define a karyotype.
7. Define an autosome. How many pairs of autosomes are in a human somatic cell?
8. List the combination of sex chromosomes for a male and for a female.
9. Define homologous chromosomes.
10. Draw a replicated chromosome and an un-replicated chromosome.
11. Describe the process of crossing over.
12. The first meiotic division ___________________ each homologous pairs when they are pulled
apart to the opposite poles of the cell.
13. How many times does the cell divide during meiosis?
14. Gametes produced by meiosis are sex cells such as sperm and egg. How are gametes different
from the rest of your cells in your body (somatic cells)?
Site 2 - Sumanas Inc., Animation of Meiosis
http://www.sumanasinc.com/ --> go to general biology --> Meiosis
13. Read the introduction. Explain how sexual reproduction results in unique offspring.
(Click the "STEP THROUGH" button)
14. DNA replication takes place when…
15. Centrosomes (a.k.a. centrioles) migrate to …
16. The pairing of homologous chromosomes is called…
17. Crossing over points are called …
18. What happens in metaphase 1?
19. What happens during anaphase 1?
20. Circle the words that correctly complete the phrase. Before meiosis occurs the cell is (haploid or
diploid) but when mitosis is complete the sex cells or gametes are (haploid or diploid).
21. Explain how the sex cells produced from meiosis differ from the original cell.
(Click to Quiz)
22. With respect to meiosis, when does DNA replication occur?
23. When does crossing over occur?
24. During which phase do chromosomes line up along the equator?
Site 3 - Biology in Motion - Meiosis
Go to www.biologyinmotion.com --> click "Cell Division Exercise" --> Click "Practice Meiosis"
25. There are two ways in which the chromosomes be sorted into sex cells after meiosis. Sketch the
two new sex cells with their possible chromosomes. Color the chromosomes using: Purple, Dark
Purple, Green, Dark Green.
Site 4: PBS: Mitosis vs. Meiosis
http://www.pbs.org/wgbh/nova/baby/ --> Click "How Cells Divide" -->"Mitosis vs. Meiosis"
26. After viewing the animation, fill out the chart below, by placing a check in the box or boxes to
indicate which the event occurs in (some events might have checks for both mitosis and meiosis).
Meiosis
Two cell divisions
Centrioles appear
Chromosomes pair up
Spindle fibers form
Two cell divisions
Cytokinesis
Four daughter cells
Mitosis