Has a genetic study/family tree, similar to hemophiliacs in royalty ever been done?

Question

with a homosexual to see if there is a gene that is dominant or recessive in the family background for this sexual orientation?

People have said that it has been scientifically proven that it is not a choice.

Now don't get excited or insulted, it is just a question.

Answer 1

It's hasn't been proven yet beyond a shadow of a doubt that homosexuality is passed on genetically. If it were, it would have to be via a dormant gene since the majority of people even in one family, are heterosexual, though the numbers are changing so who knows where things might end up?

Indeed homosexuality is not a choice, but there are as many theories out there that what makes a person homosexual is a random fluke as there are theories that it's genetic.

If it were a matter of genetics, it could be done, but you'd probably need dna testing to get genetic facts which will probably involve exuhmation of any deceased relatives depending on how far back you wanted to investigate. DNA testing alone is fairly expensive...add in the cost of collecting DNA samples from relatives living and/or dead and it just doesn't seem to make financial sense to do it.

By the by, I did find an article on one of those Christian right websites that laughably asserts that homosexuality, at least in part, is a result of socio-political influences! They never learn!

Answer 2

Note, just because it is not a choice does not mean that it is genetic.

Many things about the body are physiological in nature. Many animals actually change orientation due to social pressure and sexual balance. Some animals can even change their sex or reproduce asexually under certain population conditions.

Yes, some female lizards are capable of immaculate conception if they have reached maturity and there are no males present!

ADD: Part of the problem is that Westerners are stuck in the "black or white" argument. They want a single answer for everything.
Orientation is different for different people. Some are born gay some become gay. The reasons are as diverse as people are.

Answer 3

That is being studied as we sit hear writing on Yahoo.

There have been no conclusive findings to date, however scientists are claiming they are getting close.

The link below is pretty good, and seems non politically driven to either side of the debate. It also gives quite a few links to some of the studies to date at the bottom.

Good luck

Answer 4

It's possible it's not genetic but developmental (in utero, not upbringing, just to clarify.)