90% of unborn children diagnosed in pre-natal tests revealing downs syndrome are aborted. To suggest that the fate of unborn children with the 'high risk gene' showing the likely sexuality of the unborn child would be vastly different is to underestimate precisely what it was that drove the British Eugenics Society and their ilk to long for days such as this. Let's get this 'straight'. Both Margaret Sanger and Marie Stopes had no time for homosexuals. Zero time. The 'great eugenicist thinkers' still lauded today, like Bertrand Russell and the other elites of the Royal Society were not into the homosexual thing at all. They wanted and many still do want a utopia - a perfect society formed by an elite vanguard.
As Catholics we hold that all human life is sacred. All human life is made in the image and likeness of God. Whether such a 'gene' exists will, no doubt, become a matter of faith, rather than science. It doesn't really matter whether it genuinely exists or not since the science will remain dubious. What matters is that the scientific high priests can say that it does exist and the people will believe them.
Going by the writers and members of the British Eugenics Society and their chief obsessions I would tentatively suggest that they wouldn't be looking for the 'gay gene' if they didn't think it was worth worrying about. They are not doing these experiments 'just to find out'. If I had to make a guess, I would tentatively suggest that gays do not get a free pass into the Brave New World. We know what screening and pre-natal tests means for unborn children diagnosed with downs syndrome. It means death before seeing the light of day.
"Vee are only looking during zee experiments to see vezzer zees genes exist ya? Zer is nothing to vurry about. Move along now, zer is nussing to see here!"