There are two big risks, as I see it: 1) the human tendency to turn statistical averages into absolutes. Imagine genetic testing saying that gene A is associated with a slightly higher than average propensity for coding ability (say, 3%). Then we see people saying "Oh you can't code? Must not have gene A!" Or genetic testing revealing that someone doesn't have gene A, so they're told they can't code, even though they could very well have been great at it. All because of an extra 3% probability.
2) Making it impossible/unbearably expensive for people with genes that are correlated with higher risk of whatever conditions to get health care/insurance.
We need to be really careful with how we talk about genetic insights as we gain more and more understanding, as well as what uses of that information we allow, or we're going to get ourselves into another period of atrocities justified by what boils down to eugenics. Perhaps not on the scale of genocide of entire populations, but still bad enough.
2) Making it impossible/unbearably expensive for people with genes that are correlated with higher risk of whatever conditions to get health care/insurance.
We need to be really careful with how we talk about genetic insights as we gain more and more understanding, as well as what uses of that information we allow, or we're going to get ourselves into another period of atrocities justified by what boils down to eugenics. Perhaps not on the scale of genocide of entire populations, but still bad enough.