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Unit 3 Part 1 - Chapter 15 (Chromosomal Inheritance)

Down Syndrome (Trisomy 21)

- Down syndrome is an aneuploid condition that results from three copies of chromosome 21​ - It affects about one out of every 830 children born in the United States​ - The frequency of Down syndrome increases with the age of the mother, a correlation that has not been explained​

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- Down syndrome is an aneuploid condition that results from three copies of chromosome 21 - It affects about one out of every 830 children born in the United States - The frequency of Down syndrome increases with the age of the mother, a correlation that has not been explained