A woman has a condition where all of her gametes undergo nondisjunction of chromosome 21 in meiosis II, but meiosis I proceeds normally. She mates with a man who produces all normal gametes. What is the probability that the fertilized egg will develop into a child with Down syndrome (trisomy 21)
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A woman has a condition where all of her gametes undergo nondisjunction of chromosome 21 in meiosis...
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