Genetic studies of ethnic groups raise concerns because of fears that they could be used or distorted to justify discrimination against a group or to promote stereotypes .
Geneticists cite fears that ethnic-based research would be used or distorted to justify discrimination against a group or to promote racial stereotypes .
Asked about other possible attacks , Roberts said : " I don 't think there 's any question about it that . . . they 're going to be very global in nature .