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Research with young twins

The Adam Family

The Adam family twins and triplets are dizygotic. This means not just one, but multiple eggs were fertilized at the same time. Dizygotic siblings are as much genetically alike as their other brothers and sisters.

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: Erik, Sandra, Ruben, Juulke, Manon, Wouter and Lisanne
Helmi Maas, Ilse Verbrugge, elementary school de Octopus in Boekel and all staff at the Netherlands Twin Register

With images from the Adam family

Made by: Aline Idzerda and Jasmijn Snoijink 2012
In cooperation with
Camera & editing: Wouter Boes en Jonathan Massey
Music: Daan van West
Graphics: SproetS