Dunno if this counts as a bug, but..

One of my level fifty Throdamas has 150 offsprings, and while browsing the list, I noticed that a vast majority of them didn't inherit GP. 

Probably because of this GP rule:
"If one of the parents is level 50 and the other is not, the child will get +1 Genetic Power if it has 7 or more dominant genes from the level 50 parent."

Since Throdamas have less genes than other species (no bones), it's tougher than usual to get seven dominant ones. Maybe it's intentionally harder to GP-breed them, but I thought I should mention this just in case..