Devon Rex and Sphynx Hairless Coats

About the Coat Types

Two separate mutations in the KRT71 gene produce the curly coat of the Devon Rex and the nearly hairless coat of the Sphynx.

Both mutations are recessive, meaning that two copies, one from each parent, are required for Devon Rex cats to have curly coats and Sphynx cats to have nearly hairless coats. The tests will allow breeders to determine if a cat carries these mutations. Since some Sphynx cats carry BOTH the Devon Rex mutation and the Sphynx hairless mutation, testing Sphynx cats for the Devon Rex mutation will identify those cats that would not breed true for the hairless phenotype.

Interpretation of results - Devon Rex Coat

Test Result Interpretation
Does not carry Devon Rex Coat (Re/Re) The cat has no copies of the Devon Rex Coat mutation
Carrier of Devon Rex Coat (Re/re) The cat has ONE copy of the Devon Rex Coat mutation
Devon Rex Coat (re/re) The cat has TWO copies of the Devon Rex Coat mutation

 

 

 

 

 

Interpretation of results - Sphynx Hairless Coat

Test Result Interpretation
Does not carry Sphynx Hairless Coat (HR/HR) The cat has no copies of the Sphynx Hairless Coat mutation
Carrier of Sphynx Hairless Coat (HR/hr) The cat has ONE copy of the Sphynx Hairless Coat mutation
Sphynx Hairless Coat (hr/hr) The cat has TWO copies of the Sphynx Hairless Coat mutation

As mentioned above, some Sphynx cats carry BOTH the Devon Rex mutation and the Sphynx hairless mutation. The only way to determine this is to test these cats for BOTH the Devon Rex Coat mutation and the Sphynx Hairless Coat mutation.

Further information

View and print 'Genetic tests for cats: what the practitioner needs to know' from our Feline Update Archive

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