The Sphynx's unique hairlessness is mainly due to a mutation during the KRT71 gene, which also influences other breeds, like the Devon Rex and Selkirk Rex, albeit with distinct results. This gene is answerable for the keratinization in the hair follicle. During the Sphynx, the mutation, called "hr", results in https://josuejrfou.onesmablog.com/ragdoll-an-overview-75733800