[Eagle of Liberty]

If it was genetic, it would have been bred out millions of years ago, since they don't procreate.

So if only couples with no immediate medical history of down's syndrome were allowed to breed for a few generations, would that remove all future possibilities of down's syndrome?

[JimRed]

So if only couples with no immediate medical history of down's syndrome were allowed to breed for a few generations, would that remove all future possibilities of down's syndrome?

Maybe so, but I have not advocated forbidding anyone to breed. Homosexuals choose that path. And a recessive gene might take much longer than a few generations to disappear.