Predisposition to certain medical conditions is just the tip of the iceberg. Check out the short article behind the "discrimination based on new definitions of race, ethnicity and personhood" link. While DNA might identify legitimate proclivities towards behavior, DNA is likely to be a very weak predictor at best for the complex social behavior we're usually interested in -- thinks like proclivity to violence, or pedophilia, or laziness, say. But just because DNA isn't a very good predictor of behavior doesn't mean people won't give it more weight in their decisions than it deserves.

-- AndreiVoinigescu - 18 Dec 2008