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What is Now-a-days Down syndrome Is referred to as. and explain in detail?
* Majority of children with Down syndrome function in mild to moderate range of mental retardation. * Down syndrome / Trisomy 21 - * Genetic disorder caused by presence of all or pa of a third copy ofchromosome 21. * Typically associated with physical growth delays, characteristic facial features and mild to moderate intellectual disability. REF: DAVIDSONS 21ST ED