[@Kazemitsu] I wonder about that now.  True, that might've been the case before, where even the aliens who had Metroids right in front of them could only create weak mutations of true Metroids, but the Federation...well...  I mean, straight from the 'mouth' of Adam, the Federation was able to breed full-on Metroids with [i]accelerated growth[/i], capable of reaching the Omega status in a short amount of time.  Whatever it was that they embued those things with, I'm guessing the original hatchling from Super Metroid lacked, since it just got BIG.  The point is that the Federation may be able get Chozo DNA now, so I will say this is a valid concern that I did not think of.