User blog comment:Khalael/Canon Policy Discussion 1: Space Marines/@comment-2253300-20131106083600/@comment-8395098-20131106114437

^

How? unless the gene-seed of both says that organ _____, for chapter X) does not function, and for Chapter Y) is over active, i don't see many other ways that it'll balance. becouse if i remember right not many gene-seed mutations effect the same organs in such complimentary ways.