Question

What is the meaning of down syndrome

Answer 1

Explanation:

Down syndrome: A common birth defect that is usually due to an extra chromosome 21 (trisomy 21). Down syndrome causes mental retardation, a characteristic facial appearance, and multiple malformations. It occurs most frequently in children born to mothers over age 35.

Answer 2

Answer:

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Explanation:

A common birth defect that is usually due to an extra chromosome 21 (trisomy 21). Down syndrome causes mental retardation, a characteristic facial appearance, and multiple malformations. It occurs most frequently in children born to mothers over age 35. It is associated with a major risk for heart problems, a lesser risk of duodenal atresia (partially undeveloped intestines), and a minor but significant risk of acute leukemia.

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