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Question;Your Full Name;UMUC Biology 102/103;Lab5:Meiosis;INSTRUCTIONS;?;On your own and without assistance, complete;thisLab;5AnswerSheet electronically;and submit it via theAssignments;Folder by the date listedintheCourse Schedule (underSyllabus).;?;To conduct your laboratory exercises, use the;Laboratory Manuallocated under Course Content.;Read the introduction and the directions for each exercise/experiment carefully;before completing the exercises/experiments and answering the questions.;?;Save your Lab5AnswerSheet in the following format: LastName_Lab5 (e.g., Smith_Lab5).;?;You should submit your documentas a Word (.doc or.docx) or Rich;Text Format (.rtf) file for best compatibility.;Pre-Lab Questions;1. Compare and contrast mitosis and meiosis.;2. What major event occurs during interphase?;Experiment 1: Following;Chromosomal DNA Movement through Meiosis;Data Tables and Post-Lab Assessment;Trial 1 - Meiotic Division Beads Diagram;Prophase I;Metaphase I;Anaphase I;Telophase I;Prophase II;Metaphase II;Anaphase II;Telophase I;Cytokinesis;Trial 2 - Meiotic Division Beads Diagram;Prophase I;Metaphase I;Anaphase I;Telophase I;Prophase II;Metaphase II;Anaphase II;Telophase I;Cytokinesis;Post-Lab Questions;1. What is the ploidy of the DNA at the end of meiosis I? What;about at the end of meiosis II?;2. How are meiosis I and meiosis II different?;3. Why do you use non-sister chromatids to demonstrate;crossing over?;4. What combinations of alleles could result from a crossover;between BD and bd chromosomes?;5. How many chromosomes were present when meiosis I started?;6. How many nuclei are present at the end of meiosis II? How;many chromosomes are in each?;7. Identify two ways that meiosis contributes to genetic;recombination.;8. Why is it necessary to reduce the number of chromosomes in gametes;but not in other cells?;9. Blue whales have 44 chromosomes in every cell. Determine;how many chromosomes you would expect to find in the following;i. Sperm Cell;ii. Egg Cell;iii. Daughter Cell from Mitosis;iv. Daughter Cell from Meiosis II;10.;Research;and find a disease that is caused by chromosomal mutations. When does the;mutation occur? What chromosomes are affected? What are the consequences?;11.;Diagram;what would happen if sexual reproduction took place for four generations using;diploid (2n) cells.;Experiment 2: The;Importance of Cell Cycle Control;Data Tables and Post-Lab Assessment;1.;2.;3.;4.;5.;Post-Lab Questions;1. Record your hypothesis from Step 1 in the Procedure section;here.;2. What do your results indicate about cell cycle control?;3. Suppose a person developed a mutation in a somatic cell;which diminishes the performance of the body?s natural cell cycle control;proteins. This mutation resulted in cancer, but was effectively treated with a;cocktail of cancer-fighting techniques. Is it possible for this person?s future;children to inherit this cancer-causing mutation? Be specific when you explain;why or why not.;4. Why do cells which lack cell cycle control exhibit;karyotypes which look physically different than cells with normal cell cycle.;5. What are HeLa cells? Why are HeLa cells appropriate for;this experiment?


Paper#62770 | Written in 18-Jul-2015

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