Certainly Cats have thier characteristics passed from generation to generation depending of course on thier parenatge.
Is Buttermilk a passive Cat, as that is one of the characteristics of the Ragdoll.
Thats how they got thier name, they go limp when you pick them up.
Theres quite a few Ragdoll Breeders , just type in Ragdoll Cats and away you go!!!