Question 66819

Fred has Klinefelter syndrome (XXY) along with Norrie’s syndrome, an X-linked recessive disorder which causes cataracts. Fred’s mother and his father both do not have Norrie’s syndrome. Fred’s mother’s father does have Norrie’s Syndrome. Assuming Fred’s Kleinfelter Syndrome arose from nondisjunction in meiosis, then identify the parent and specific meiotic division where the disjunction error most likely occurred. Explain your answer using a pedigree and diagram to show the nondisjunction

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