User blog comment:Bioshocknall/shepard kids pt 2/@comment-98.162.189.139-20110611135638/@comment-1440333-20140127200254

that analysis doesnt work - as all of those animals have similar DNA. Turians and quarian are dextro-DNA - meaning their DNA is incompatible with human DNA because it is an exact mirror image of human DNA eg the helix spirals in the opposite direction. Meaning the two zygotes, sperm and egg, will be unable to combine their DNA into a functioning helix - meaning proteins will not form. A hybrid of a dextro and a levo race is practically impossible.