Quote Originally Posted by Veklim View Post
I'd expect any obvious mutations to be a result of an external influence, perhaps a bacteria which grows in the air recycling system, or a synthetic nutritional supplement in the food algae which had unforeseen consequences.
And considering how incredibly complicated God's designs for the ecosystems are, and how humans have tried and failed several times to properlty duplicate such engineering (the biosphere experiments), I would expect there to be several such unforseen consequences.