Meiosis - Internet Lesson 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 - Lew-Port's Meiosis Page Go to-->Lew-Port's Biology Place and click on Meiosis (also try googling "lewport biology animations" for shortcut) 1. How many chromosomes does the cell in this animation start with ? __________________ 2. The homologous pairs are represented by similar ________________________ 3. When chromosomes make copies of themselves, they _____________________________ 4. Copies of chromosomes are held together by the _____________________________ 5. Each chromosome finds its __________________________________________ 6. Draw "crossing over" - using your pencil to shade in the areas that exchange parts. 7. How many chromosomes are at each pole of the cell? ___________ 7. During meiosis 2, chromosomes line up again along the cell's ___________________________ 8. Only _________ copy of each chromosome moves toward the poles. Which means only _________ chromosomes of the original six. 9. New membranes form around each ____________________________ 10. Each cell divides, forming a total of ______________ cells. Site 2 - Sumanas Inc., Animation of Meiosis http://www.sumanasinc.com/ ---> go to animation gallery --> go to general biology --> Meiosis 12. Read the introduction. Explain how sexual reproduction results in unique offspring. (Click the "STEP THROUGH" button) 12. DNA replication takes place when? __________________ 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 during anaphase I __________________________________________ 19. What is interkinesis? ____________________ 20. In prophase II, each cells is [ diploid / haploid ] (circle) 21. In metaphase II, chromosomes line up in [ single | double ] file. 22. What happens during telophase II? _______________________________________ 23. (Click to Conclusion). Each of the four daughter cells produced by meiosis is [ identical / unique ] (Click to Quiz) 24. With respect to meiosis, when does DNA replication occur? ____________________ 25. When does crossing over occur? _________________ 26. During which phase do chromosomes line up along the equator? __________________ 27. During which phase does the nuclear membrane form around the chromosomes? _____________ Site 3 - Biology in Motion - Meiosis Go to www.biologyinmotion.com --> click "Cell Division Exercise" --> Click "Practice Meiosis" http://www.biologycorner.com/worksheets/meiosis_internet.html#.UzvtLK1dWE4
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Meiosis: Internet Lesson
28. There are two ways in which the chromosomes can end up after meiosis. Sketch the two ways and indicate by color the chromosomes (use the following color codes: 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" 29. 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).
http://www.pbs.org/wgbh/nova/baby/ --> Click "How Cells Divide" -->"Mitosis vs. Meiosis". 29. After viewing the animation, fill out the chart below, by placing a ...
like? 10. You crossed 2 purple tribbles and, surprisingly, some of the offspring were red, some were purple and some were blue. What kind of dominance is this?
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Chromosomes line up along equator, not in homologous pairs. 5. Crossing-over occurs. 6. Chromatids separate. 7. Homologs line up alone equator. 8. Cytoplasm divides, 2 daughter cells are formed. Page 1 of 1. Meiosis - Name the Phases.pdf. Meiosis - N
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