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The Netherlands Twin Register

Twin research

The colour of your eyes and hair, the shape of your ears: all these features are determined by the genes you inherit from your parents. But what determines your intelligence? Whether you’re a sore loser? Whether you enjoy sports or good food? Behaviour is determined in part by genes, and in part by your surroundings. But what exactly is the ratio?
25 years ago the Netherlands Twin Register was founded to investigate this.

This video is not available in English.


Produced by Fast Facts
With the support of the Netherlands Twin Register

Thanks to the Adam family, the Pelt family, the Prins family and the Sonneveld family, elementary school de Octopus in Boekel, Helmi Maas, Ilse Verbruggen, swimming pool Dol-fijn, healthcare organisations Pieter van Foreest, mrs. Tangelder and mrs. Solleveld-Hanemaaijer, Angelique van Bruggen, the Dutch Twins Association and all staff of the Netherlands Twin Register

With images of: the Adam, Sonneveld, Prins and Pelt families and of Klokhuis

Made by: Aline Idzerda, Jasmijn Snoijink, Marieke Aafjes and Moira van Dijk 2013
In cooperation with
Camera & editing: Wouter Boes en Jonathan Massey
Music: Daan van West
Graphics: SproetS