I was in my Philosophy class earlier this week and we were assigned a book to read called "The future of human nature" by Jurgen Habermas. In the book Habermas goes into what advancements are being made in the study of human genetics and the ethical decisions that await us in the near future.
One procedure in particular caught my attention, Preimplantation genetic diagnosis or PGD for short. In this procedure a woman has an embryo removed when it is the eight cell stage so that it can be checked for possible diseases or ailments. You may be thinking "Well what does this have to do with me?" just wait and you'll see.
This test tells parents what possible disabilities a child may have in life such as down syndrome or being physically handicapped. The theory is that soon enough as our knowledge of genetics increases we'll be able to change this disabilities so that the embryo may live a "normal" existance. But this is a flood gate argument as to where we draw the line. If we can modify an embryo so it doesn't have life threatening diseases, what about ones that hinder individuals, what about slight medical problems? Thats when things start to get scary as you cross the line into positive eugenics. You could change a childs eye color, hair color, etc. Why not make your child stronger, smarter, more attractive? The possibility is there to create super humans with this science.
Now heres where I bring it home: Studies have shown that homosexual males have abnormally sized nuclei in their brain cells (at least those in the study did) hinting even more that homosexuality is a genetic trait and not necessarily a choice. If this is the case through the genetic modification on the horizon the possibility exists to change a childs sexuality before they're even born. If this is the case what parent would choose to keep their child gay? Could this actually lead to the extermination of an entire culture?
Now keep in mind these are still theoretical and haven't come to be yet (PGD exists but the rest are just theory). But with things the way they are (Hell we just cloned a monkey sucessfully a week ago) isn't it scary?
This is just something I've been throwing around and was wondering what other people thought on the matter.