Board Thread:Warhammer 40k General Discussion/@comment-91.224.27.226-20131031140001/@comment-18016240-20140102073126

Neithan02 wrote: you would still have pockets in the legion that look differently.. as gene seed is passed on and so on.

and 1 marine looking differently, or a group, maybe even with defective organs or sth else... that does not go unnoticed Simple, mutation. It's not as if the answer isn't wherever you look when a chapter appears, lots of them have weird little quirks that seperate them from their original legion.