Genetic Influences on Female Sexual Orientation and Gender Identity
Author Information
Author(s): Andrea Burri, Lynn Cherkas, Timothy Spector, Qazi Rahman
Primary Institution: Queen Mary University of London
Hypothesis
Genetic factors significantly influence variation in measures of sexual orientation and its two covariates – childhood gender typicality (CGT) and adult gender identity (AGI).
Conclusion
The study found that genetic factors account for a moderate portion of the variance in female sexual orientation and childhood gender typicality, while adult gender identity showed a weaker genetic influence.
Supporting Evidence
- Genetic influences accounted for 25% of the variance in sexual attraction.
- Childhood gender typicality showed a heritability estimate of 32%.
- Adult gender identity had a heritability estimate of only 11%.
- The study used a large sample of 4,426 female twins.
- A common pathway model best explained the association between sexual orientation, CGT, and AGI.
Takeaway
This study looked at how genes affect women's sexual orientation and how they behave as children. It found that both genes and the environment play a role in these traits.
Methodology
A multivariate genetic analysis was performed on a large sample of British female twins who completed questionnaires assessing sexual attraction, childhood gender typicality, and adult gender identity.
Potential Biases
The reliance on self-reported measures may introduce biases, and the retrospective nature of some assessments could affect accuracy.
Limitations
The study had a lower response rate compared to other studies, and the measures used for adult gender identity had low internal consistency.
Participant Demographics
Participants were British female twins, with a mean age of 53.36 years.
Statistical Information
P-Value
0.05
Confidence Interval
95% CI not specified
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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