Though Dominant Inheritance of Mental Retardation Is Very Rare, the Text

question 64

Multiple Choice

Though dominant inheritance of mental retardation is very rare, the text mentions two disorders transmitted in this manner. Which of the following is such a disorder?

• A) phenylketonuria
• B) Fragile X syndrome
• C) tuberous sclerosis
• D) galactosemia
• E) Tay-Sach's disease

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Definitions:

Retroflexion

A condition where an organ is bent backward, often referring to the uterus when it tips backwards.

Retroversion

The tilting backward of an organ or part, such as the uterus, from its normal position.

Anteflexion

The bending forward of an organ or part of the body.

Anteversion

A forward tilting of an organ, such as the uterus, from its normal position.