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KARYOTYPING An Online Activity The purpose of this activity is to investigate a procedure called karyotyping. A karyotype is a map of one’s chromosomes. Such a genetic map can be important in detecting certain genetic disorders such as Edwards syndrome and Cri-du-chat. Your assignment is to complete the online karyotype found at the site below which entails evaluating 3 patient case histories, completing their karyotype, and diagnosing any missing or abnormal chromosomes they may have. http://www.biology.arizona.edu/human_bio/activities/karyotyping/karyotyping.html Introduction Go to the above address and read the introduction on karyotyping and G banding. 1. Why are cells undergoing mitosis used for karyotpying? 2. How are chromosomes analyzed? List 3 ways. a. b. c. After reading the opening page, click on “Patient Histories”. Patient A Read patient A’s history and click on “Complete Patient A’s Karyotype”. Match the chromosome in the upper left corner with one of the chromosomes further down on the page by clicking on the number below the chromosome. Repeat this process until all chromosomes are paired up correctly. The computer will allow you to correct all mistakes you may have made. Patient A A 1. What notation would you use to characterize Patient A's karyotype? A 2. What diagnosis would you give patient A? Patient B Repeat the procedure for patient B as you did for patient A. B 1. What notation would you use to characterize Patient B's karyotype? B 2. What diagnosis would you give patient B? Patient C Repeat the procedure for patient C as you did for patient A. C 1. What notation would you use to characterize Patient C's karyotype? C 2. What diagnosis would you give patient C? Q: Do the chromosomal disorders in this activity affect a single gene, and therefore a single protein, OR several genes and several proteins? Explain.
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