This may sound stupid but why does Lucas have hair, all other clones are bald even after the experiments. I get that he broke free from the rest but why whould bald be in all the clones "Programing", and why whould 47 not grow hair after he got his mind back to hide the barcode. I get that they are hairless during the experiments but 13 (or whatever number the clone you chase in silent assassini think) is still bald and he survived.
Any theory is happily reicived in the comments