Regarding Genetic Causes of Intellectual Disabilities,which of the Following Statements

question 28

Multiple Choice

Regarding genetic causes of intellectual disabilities,which of the following statements is FALSE?

• A)Down syndrome children have an extra X chromosome in the 23rd pair.
• B)Although Down syndrome is genetic,it is not usually hereditary,that is it doesn't "run in the family."
• C)Children with PKU (phenylketonuria)have an inherited inability to control a destructive chemical that builds up in their bodies.
• D)Individuals with Down syndrome have almond-shaped eyes,a slightly protruding tongue,a stocky build,and stubby hands with deeply creased palms.

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