Board Thread:Warhammer 40k General Discussion/@comment-4851119-20140118095944/@comment-86.190.171.84-20150107130005

Their sharing of genetic material is akin of the clone like breeding of plant life, as in mutation (be that adaptive or detrimental) merges with the genes of the host but retains the basic functionality of it's original format until a large enough amount of mutation comes to change the functionality (be that for the better - evolution - or the worse e.g. organ failure).

You will always have some cross contamination from implant to host as the host has various, semi-specific anti-bodies in their blood, which is why a transfer starts of looks at this first them looks at the tissue match after. The host, having healthy bone marrow will produce their nature genetic material.

So no, I'm not saying they will reproduce like humans. The newly implanted organs will produce from them own stem cells, once the respective hormones for whatever organs are implant are detected...barring some cancer like mutuation growth, organ failure, hormone secreated in enough quantity etc

I'm laughing my head off...not...and mutation rate would vary, chapter to chaper, year to year with a gradual spread. Tight quality controls would clearly assist in limiting this.