Is Sexual Orientiation genetic or is it a choice?
This simple question does not have a simple answer.
Genetics is the domain of medical science. What has science found regarding sexual orientation? First, science has found that sexuality and sexual orientation are some of the most complex aspects of people and the answers to simple questions like "What causes sexual orientation?” are not simple.
Some researchers have studied twins. The study by Bailey and Pillard, published in 1991, reported that when one twin is homosexual, the number of times the other twin is also homosexual occurs more often than the general rates of homosexuality in society. The media reported this as proof that sexual orientation is genetic. But Bailey and Pillard themselves clearly stated that this study did not prove that homosexuality was solely caused by something genetic. Interestingly, this study also looked at the rest of the family and found that the rate of homosexuality among the rest of the family, including adopted brothers was 200-300% more frequent than the general rate in society. And so the data indicates that something is causing homosexuality to occur more frequently in the families that were studied but that it can not be genetics because the increase also occurs in adopted brothers who do not share any genes at all with the rest of the family.
Others have studied hormones and brain structures looking for other possible causes that are biological but not genetic. While they have found there may be biological differences between heterosexuals and homosexuals, they can not determine if these possible differences cause homosexuality or they are the result of homosexual activity.
Still others have studied sociological and psychological causes for sexual orientation. And they have found substantial evidence that sexual orientation is developed (something you grow into) and that it is not fixed but changeable.
When all of the work being done is put together, the question about what causes sexual orientation seems best answered as follows.
Now the second part of the question - is sexual orientation a choice? No it is not a choice. No one is able to decide on a specific day that from that day onward they will be a same-sex attracted or opposite-sex attracted. People do not consciously decide their sexual orientation.
Returning to the question - is sexual orientation genetic or is it a choice? The answer is neither.
The causes of same-sex attractions are multi-causal and complex, and we should not adopt a simplistic either/or approach when looking for what causes sexual orientation.
"Perhaps one of the biggest concerns for the person on the street is whether we are stuck with our genetic inheritance, or whether we can overcome our genes. Dean Hamer stated, ‘One of the biggest myths is that something is genetic is therefore fixed. This simply isn’t true. It’s what we do with our genes that matters. Someone who relishes novel experiences might use this trait for good or for bad — to become a great explorer or a violent criminal. All these genes do is to give us a disposition one way or another. Whether we act on that —or don’t — is very much a matter of our free will.’ [The Power of Our Genes: An Interview with Dean Hamer, Science & Spirit, December 1998].
For more information about the roots and causes of homosexaulity, please go to the Articles section.