Do you know what's funny? If you google the words "epi-marker defect" or "epi-marker mistake" (with quotations) the only results you'll get are your comments on topix.<quoted text>
If you don't know the cause how can you assert the result?
The epi-marker defect is all but proved. What does that say about the APA?
There aren't any scientists who use those terms. You made them up.
And what do you think will happen "if" someone finds out how to determine if an embryo has the potential to be gay--to have a "birth defect", as you like to say?
Obviously there's not going to be a "cure"--at least not for several generations.
Will you suddenly become an advocate for abortion? Will you want to kill the gay embryos? Will you demand that they be hacked to pieces and sucked out of their mother's wombs?
Bottom line, you're an idiot... You wouldn't know an "epi-marker" if it jumped up and slapped you in the face.
Get a life. Stop pretending to be a scientist.