Why are Grendels so nasty? Why do they always beat up Norns?
The "secret"
of this nasty behaviour lays (you already guess, didn't you?)
in the genes and its settings. If you have a closer look at
the stimuli genes then you'll find most of don't differ from
those of Norns. But there are a few which are set in a way
that Grendels react with "hitting" to certain environmental
conditions. E.g. if they get pet by another creature they
react to that with a hit! Or another one telling them if they
hit a machine or an animal they get internal reward for this
and boredom reduces. And they hit others if they feel crowded.
That's why Grendels seem to be so nasty to other creatures!
The Grendel genome is a bit smaller than that of the Norns. There are a few receptor genes missing, totalling to 48. Most of them are receptor genes for Antigenes. This means Grendels don't get infected so easily by bacterias as Norns do ... There are also a few chemical emitter and reaction genes missing, but I think that's not noticable.