Genetic and Environmental Effects on Same-sex Sexual Behavior: A Population Study of Twins in Sweden

@article{Lngstrm2010GeneticAE,
  title={Genetic and Environmental Effects on Same-sex Sexual Behavior: A Population Study of Twins in Sweden},
  author={Niklas L{\aa}ngstr{\"o}m and Qazi Rahman and Eva Lindholm Carlstr{\"o}m and Paul Lichtenstein},
  journal={Archives of Sexual Behavior},
  year={2010},
  volume={39},
  pages={75-80}
}
There is still uncertainty about the relative importance of genes and environments on human sexual orientation. One reason is that previous studies employed self-selected, opportunistic, or small population-based samples. We used data from a truly population-based 2005–2006 survey of all adult twins (20–47 years) in Sweden to conduct the largest twin study of same-sex sexual behavior attempted so far. We performed biometric modeling with data on any and total number of lifetime same-sex sexual… 
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