Ultrasound abortion bill not having intended effects

[Temujin]

If am not mistaken, are we really certain that just one gene is 100% responsible for all the different conditions were talking about? And even if that is the case, aspects of the gene should theoretically be able to be modified, keeping the good and eliminating the bad; though granted were currently far away from that capability and it would require a lot of testing to perfect.

Homosexuality is a complex genetic and developmental trait. Multiple genes probably exist that serve other functions but in particular combinations produce homosexuality. That is why a "gay" gene is so hard to pin down. A single "gay" gene actually cannot evolve. However if you have a group of genes that control for something like testosterone receptor density in the brain of a developing fetus, some of which are always on and others that are turned on by a regulatory cascade during female-->male brain differentiation(this particular scenario is something I am tossing out there, the work has not been done) combined with other genes that are non-additive in their interactions, meiotic drive, and the fraternal birth order effect, you can explain the entire spectrum. To simplify it, lets only consider the testosterone receptors.

Six genes, A, B, C, D, E. Each one has two alleles, A1 is +1, A2 is 0, same for the rest. Lets say that the A and B and C loci are always up regulated, D and E get turned on when you have a Y chromosome. Closer you are to 0, the fewer testosterone receptors and the more likely male homosexuality is, the converse is true with higher numbers and lesbians. In this scenario most people are heterozygotes at all loci. Women have 3, men have 5, though numbers as low as zero are possible for everyone, highs of 6 for women and 10 for men also possible. A male with 0 would end up basically transsexual.

This is of course ignoring the fraternal birth order effect, non-additive genes (like the one that has been detected on the X chromosome), and a bunch of other stuff, and the above is of course a theoretical exercise because the work has not been done yet.

Thanks, that's kind of what I figured, that's why all this harping about a '_____' gene is nonsense, these things are way too complex to generally have a simple on and off switch, especially not without having potential undo consequences that involve other physiological aspects on the patient's body.