
A BBC feature revisits decades of research on nature versus nurture, showing that genes influence many personality traits but do not fully determine who we become. It highlights classic twin studies that found striking similarities in identical twins raised apart alongside newer genetic and epigenetic work that reveals important environmental and developmental effects. The article links to broader debates about heritability, echoing recent studies on lifespan and brain conditions that show genetic contributions are important but often intertwined with non‑genetic factors.
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