8. Down Syndrome most commonly results from having three copies (trisomy) of chromosome 21 instead of two. Below is a fertilization event that could have given rise to Down Syndrome. Identify nen gamete is abnormal and explain how the abnormal gamete could have been produced from a nondisjunction event in meiosis I and from a nondisjunction event in meiosis II.
8. Down Syndrome most commonly results from having three copies (trisomy) of chromosome 21 instead of two. Below is a fertilization event that could have given rise to Down Syndrome. Identify nen gamete is abnormal and explain how the abnormal gamete could have been produced from a nondisjunction event in meiosis I and from a nondisjunction event in meiosis II.
Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Chapter11: Meiosis: The Cellular Basis Of Sexual Reproduction
Section: Chapter Questions
Problem 5TYK
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