Genetic modification through virii doesn't necessarily effect all or any of the reproductive system. It's very likely that you could create a genetic elite but they'd need to tailor their children and their children's children... creating a new species in this fashion would be quite difficult. Also, as a result, any genetic defects you were born with would be passed on to your kids (for you to cure presumably at some expense). This would prevent the whole deal with not wanting people to pass on their defective genes... everyone would still have 'em, they'd just remove their expression in their own persons.
That being said, who's seen GATACA?
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Genetic modification through virii doesn't necessarily effect all or any of the reproductive system. It's very likely that you could create a genetic elite but they'd need to tailor their children and their children's children... creating a new species in this fashion would be quite difficult. Also, as a result, any genetic defects you were born with would be passed on to your kids (for you to cure presumably at some expense). This would prevent the whole deal with not wanting people to pass on their defective genes... everyone would still have 'em, they'd just remove their expression in their own persons. That being said, who's seen GATACA?