1Clinica Pediatrica dell’Università di Versailles, Francia
2Clinica Pediatrica dell’Università “Federico II”, Napoli
Key words: Twins, Behavioural Genetics, Serotonin, Dopamine
The genes of happiness are the best candidates for coding dopamine receptors, whereas the genes of sadness are the best candidates for coding serotonin metabolism and re-uptake. In fact, several studies on separately grown homozygous twins demonstrate, in a very convincing manner, the existence of a genetic substratum for character features such as feeling of well-being, extroversion, nervosity, friendliness, curiosity, readiness to live new experiences. All these features depend on genetics for at least 50%.
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