Axel The Englishman
The Holy Crusader
Now, if we've only got two animals aboard - one male, one female - and we're relying solely on those two to bring back their species, this would result in a VERY narrow gene pool with each of the animals of the same species being prone to the same illnesses. This is why animals vary in terms of our genes. If one of us gets a lethal disease, some of us won't be prone to it and the species will live on.