New Installer for Dawinbots 2 Released.
Keep in mind how many embryos that are fertilized never result in a viable pregnancy. Not just miscarriages, but "pregnancies" of only a week or less that we never really know about. So there's a bit of a survivor's bias.
Maybe there's also some intelligent mutation-ing going on. Maybe some parts of the genome are allowed to mutate more than other parts.
A mutation in a functional part of the genome (which is certainly bigger than 5%)
Chances are very high that it will remain neutral or have a very small effect (positive or negative) on fitness.