The strongest support for the theory that personality is heavily influenced by genetics is provided by strong personality similarity between:
Correct answer: B. identical twins reared apart
- A. identical twins reared together
- B. identical twins reared apart
- C. fraternal twins reared together
- D. non-twins reared together
Explanation
Identical twins share virtually all of their genes, so strong similarity despite being raised apart provides the clearest evidence for genetic influence. Twins raised together also share an environment, which makes that evidence less decisive.
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