AP Psychologymediummcq1 pt
Twin studies of personality show that
A.genes account for roughly half of trait variation
B.genes play no role
C.environment plays no role
D.traits are completely random
Explanation
Core Concept
Identical twins resemble each other on the Big Five even raised apart — heritability around 40–60%, with the rest environmental.
Correct Answer
Agenes account for roughly half of trait variation
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