Dog breeders actually do cultivate genetics. Rat terriers, pointers, herding dogs have genetic traits. I once had a corgi/shepherd mix (a short-legged shepherd). She herded our cats as a natural instinct having never been around another herding dog of receiving training to do that. I know, dogs are not people, but they are sentient with emotions like fear, aggressiveness, jealousy, etc. We may have different ideas about the nature of genetics.