Tim, thanks for the feedback and I'll be the first to admit that I'm not a scientist, so I probably got the details wrong, but the story was about more than just scientific facts. I also think I stated you could have one recessive gene and be straight, but having two or three you would make the individual bi, meaning the person had a choice to some extent, although they still might have been leaning one way or the other.
What I was attempting to show with this story was how the science could be abused and manipulated to reinforce a belief. Where it was at first hoped the findings would put an end to the debate over whether homosexuality was a choice, others were ready to use this new knowledge to identify or eliminate the segment of the population they disagreed with. It didn't matter to them whether the individual was born that way or had made a choice, they just saw it as a way to advance their own agenda. For me, that was the scary part of the story.