The primarchs were genetically engineered and space marines are supposedly derived at least in part from their DNA. I don’t think the imperium counts emperor-ordained modification as a mutation.
Or it’s just overlooked because of their usefulness, like they do with the mechanicus and their worship of the omnissiah.
I am not a biologist. Does human meddling not result in/classify as a mutation¿? Or are there no genetic changes to integrate the extra organs¿?
I am sure I read somewhere in official literature that space Marines are genetically modified.
The primarchs were genetically engineered and space marines are supposedly derived at least in part from their DNA. I don’t think the imperium counts emperor-ordained modification as a mutation.
Or it’s just overlooked because of their usefulness, like they do with the mechanicus and their worship of the omnissiah.