The best summary statement regarding the role of heredity on human intelligence is that

Correct answer: A. heredity may impose upper limits on intelligence.

  • A. heredity may impose upper limits on intelligence.
  • B. heredity may impose lower limits on intelligence.
  • C. intelligence is almost completely related to genetic inheritance.
  • D. the similarity in IQ scores among maternal relatives is greater that that among paternal relatives.

Explanation

Heredity helps set a potential upper range for intellectual performance, while environmental factors influence how fully that potential is developed. Intelligence is therefore not almost completely genetic, and maternal and paternal relatives are not inherently different in this respect.

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