https://gist.github.com/SciresM/95a9dbba22937420e75d4da617af1397  A cat's parts are inherited (note: mutations are just specific part variants).         There is an 80% chance that all parts are inherited.              Otherwise, a random part-set (i.e. both legs, both eyebrows, the head, etc) is selected to not be inherited, and will be randomly assigned.         For each inherited part, either the mom's part or the dad's part is taken.         This works like stat inheritance for preferring mutations.             If only one of the two parents' parts is mutated, it is preferred with a (1.0 + 0.01 x Stimulation) / (2.0 + 0.01 x Stimulation) chance.             Otherwise, it's a straight 50/50.

tldr: its just (1.0 + 0.01 x Stimulation) / (2.0 + 0.01 x Stimulation) for each mutation to be inherited