Meiosis Webquest

Meiosis Webquest Name: Task 1: Introduction to Meiosis Click link below to watch the "Meiosis" video by the Amoeba Sisters. As you watch, answer the following questions. CLICK HERE 1. What does the process of meiosis contribute to? Genetic variety 2. What type of cells does meiosis produce? Gametes 3. How many chromosomes does a human sperm cell or egg cell contain? 23 4. Why is meiosis a "reduction division"? It reduces the chromosome number by half 5. Which phase must take place before meiosis starts? PMAT 6. How many times is "PMAT" carried out in meiosis? 2 7. Describe what happens during prophase. Chromosomes condense 8. What happens during crossing over? Homologous chromosomes exchange genetics 9. Where are the chromosomes during metaphase 1? Cell equator 10. What happens during anaphase 1? Pulled to opposite sides 11. How many cells exist after Meiosis 1? 2 12. What is pulled away by the spindle fibers during anaphase II? Sister chromatids 13. What happens during telophase II? Nuclear membrane forms Science is Real 14. VWhy do siblings from the same parents look different from each other? Because of genetic recombination and independent assortment 15. What does nondisjunction lead to? An abnormal number of chromosomes in a cell Task 2: Meiosis and Genetics Game Click link below to complete the Snurfle Meiosis and Genetics game on the Bioman Bio website. Answer the questions below as you move through this activity. Click on Start a New Game → Press Space Bar to Continue → Click Meiosis Interactive Meiosis I 16. Which phase occurs before meiosis can take place? interphase 17. What is chromatin made of? DNA/RAN and proteins 18. How many pieces of chromatin are in human cells? 92 19. What does chromatin contain? DNA and proteins 20. What is the allele for yellow fur? Y What is the allele for green fur? Y 21. What must DNA do before meiosis can occur? DNA Replication 22. Why do organisms undergo meiosis? They make haploid cells 23. What are the four phases of meiosis in correct order? Prophase 1, metaphase 1, anaphase 1, telophase 1 Science is Reul 24. During Prophase I, why are condensed chromosomes called homologous chromosomes? Because they align with their matching partner from the other parent 25. What are the identical halves of a chromosome called? Sister chromatids 26. What part of the cell disintegrates during Prophase I? Nuclear envelope 27. List the 3 events that take place during Prophase I. a. synapsis b. crossing-over C. Decondensation of nucleus 28. In the table on the last page of this webquest, draw or insert a screenshot of what the cell looks like at the end of Prophase I. 29. What is crossing over and when does it occur. Denetic segments are swapped by chromosomes 30. Where do the tetrads move during Metaphase I? Metaphase plate 31. In the table on the last page of this webquest, draw or insert a screenshot of what the cell looks like at the end of Metaphase I. 32. What happens during Anaphase 1? Homologous chromosomes are separated and moved towards cell poles 33. In the table on the last page of this webquest, draw or insert a screenshot of what the cell looks like at the end of Anaphase I. 34. When occurs during Telophase I? Cell divides 36. In the table on the last page of this webquest, draw or insert a screenshot of what the cell looks like at the end of Telophase I. 37. What is cytokinesis? 38. How many cells are there after meiosis I is complete? 39. Why are the new cells haploid? Meiosis II 40. How is Prophase II different than Prophase I? 41. In the table on the last page of this webquest, draw or insert a screenshot of what the cells look like at in Prophase II. 42. What occurs during Metaphase II? 43. In the table on the last page of this webquest, draw or insert a screenshot of what the cells look like at in Metaphase II. 44. What occurs during Anaphase II? 45. In the table on the last page of this webquest, draw or insert a screenshot of what the cells look like at in Anaphase II. 46. In the table on the last page of this webquest, draw or insert a screenshot of what the cells look like at in Telophase II. 47. What three events occur during Telophase II? a. b. C. Science is Real 48. What are the final results after Telophase II and Cytokinesis are complete? 49. Draw or insert a screenshot what the cells look like at the start of meiosis, end of meiosis I, and the end of meiosis II in the diagram below. Start of Meiosis End of Meiosis I End of Meiosis II Extension Watch real meiosis occurring under a microscope. Click the link below to watch the amazing Meiosis video by WEHImovies. Meiosis Table Prophase I Metaphase I Anaphase I Telophase I Prophase II Metaphase II Anaphase II Telophase II Use this space for additional notes, questions, or comments about the lesson.