R2d2 (IMAGE) University of North Carolina Health Care Caption R2d2 is selfish, strong, and fights back against Mendel's "law of segregation" and Darwin's principle of "fitness." Credit Max Englund, UNC Health Care Usage Restrictions credit properly License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.