Multiple choice

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

  1. heredity may impose upper limits on intelligence

  2. heredity may impose lower limits on intelligence

  3. intelligence is almost completely related to genetic inheritance

  4. the similarity in IQ scores among maternal relatives is greater than that among paternal relatives
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A Correct answer
Explanation

Heredity sets potential upper bounds on intelligence, but environment determines where within those bounds an individual falls. This reflects the nature-nurture interaction. Neither heredity nor environment alone determines intelligence - it's their interplay.

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