The chief chromosomal feature of fragile-X syndrome is that:
a single gene has more than 200 repetitions of one triplet.
the X chromosome carries dangerous recessive genes.
the X chromosome carries dangerous dominant genes.
the X chromosome is missing.
a single gene has more than 200 repetitions of one triplet.
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Which of the following have been used to treat obesity?
a. amphetamine b. chlorpromazine c. cocaine d. diazepam
More than any other aspect of language, texting has affected
a. semantics. c. grammar. b. phonology. d. pragmatics.
An intelligence test has high reliability if
A) it accurately predicts children's academic performance in school. B) it yields similar results when given twice within a short period of time. C) the content of the test is related to theoretical models of intelligence. D) it is correlated with other established measures of intelligence.
In the majority of cases, the cause of intellectual disability is ________
a. poor prenatal nutrition b. unknown c. clearly identified genetic abnormalities d. prenatal drug abuse by the mother