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Final answer:
Nondisjunction in meiosis leads to genetic disorders like Down syndrome, which involves an extra chromosome 21. Chromosomal disorders often involve the X chromosome due to its size disparity with the Y chromosome.
Explanation:
Nondisjunction is the failure of replicated chromosomes to separate correctly during meiosis, leading to genetic disorders caused by abnormal chromosome numbers. An example is Down syndrome, where an individual inherits an extra copy of chromosome 21 due to non-disjunction. Most chromosomal disorders, including Down syndrome, involve the X chromosome due to the differences in size between the X and Y chromosomes, making non-disjunction of sex chromosomes relatively common.
Learn more about Nondisjunction and Chromosomal Disorders here:
https://brainly.com/question/30832885
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