In children born with _____, deficits in intellectual functioning occur due to a lack of the enzyme hexosaminidase

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Deficits in intellectual functioning occur in children born with Tay-Sachs disease due to a lack of the enzyme hexosaminidase. Down syndrome is caused by an extra copy of chromosome 21, Fragile X syndrome is caused by a mutation in the FMR1 gene, and phenylketonuria is caused by a deficiency in the enzyme phenylalanine hydroxylase.

In Children Born with _____, Deficits in Intellectual Functioning Occur