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Biology 15 Online
OpenStudy (anonymous):

Medal for Help Using your knowledge of meiosis and the formation of gametes, consider the following information. Down syndrome is caused by nondisjunction of chromosome pair 21. If a person with Down syndrome has a child with a person who does not have Down syndrome, what is the probability that the child will have Down syndrome? 50 percent 0 percent 100 percent 75 percent

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