Hairlessness in mammals is due to complex genetic changes in both genes and regulatory regions.
Hairless mammals evolved quickly in both gene and non-gene areas related to skin and hair.
16 citations
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April 2018 in “Animal Genetics” Researchers found two genes that may explain why some Casertana pigs don't have hair.
October 2025 in “International Journal of Advanced Multidisciplinary Research and Studies” Hairless dogs have unique skin adaptations to regulate temperature and protect against environmental factors.
75 citations
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October 2010 in “Mammalian genome” Sphynx cats are hairless and Devon Rex cats have curly hair due to specific genetic mutations.