custom species

either create a custom species in character creation(it would function similar to create-a-style from the sims series, only allot for the adding of multiple eyes, genitalia, tails, limbs, ears, etc)

or, in later levels, allow you construct test subjects from the ground up, using junk genes(fluids from other subjects like blood, urine, semen, vaginal secretions, floors, counter tops, toilet seats, door handles((alot of genetic information can be found on those things, bacteria, virus's, fungui, shin flakes, etc)) )