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How do you become you?

Scientists believe that both your environment and your genes influence the person you become. But searching for genes involved in behaviour is controversial, especially for those genes that may influence aggressive or addictive behaviour. Some worry that this knowledge may be misused to discriminate against people, or provide excuses for antisocial behaviour.

Scientists believe that both your environment and your genes influence the person you become.
Scientists believe that both your environment and your genes influence the person you become.
Suhail Islam, Imperial Cancer Research Fund / Wellcome Photo Library / Photodisc

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