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From Warhammer 40k - Lexicanum
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==Overview==
[[Image:Geneseed_mutation_DWRB.jpg|thumb|300px|right|A table showing the calculated chances of geneseed mutation in the [[First Founding]] chapters.]]
It is used to grow the artificial organs which distinguish an [[Adeptus Astartes]] from an ordinary human, and helps alter the human's biology to accept the implanted organs. Gene-seed is a Space Marine [[Chapter]]'s most precious resource, and is conserved by extracting the [[progenoid]] glands from fallen [[Battle-Brother]]'s for return to the chapter's [[fortress-monastery]].