Cu-Locus (curl)


The Cu-Locus is a region of your dog's DNA which determines whether your dog will have a curly, wavy, or straight-haired coat. The mutation affects keratin, which is a building block of hair, and changes the structure resulting in curls.

The curl is caused by a mutation on the KRT71 gene. This is an incomplete dominant trait meaning that two copies will cause a curly coat and no copies will cause a straight coat, but one copy can cause a wavy or slightly curly coat.


Your results will be reported as one combination of the Cu-locus alleles with the following interpretations.

Cu/Cu - two copies of curl - curly coat
Cu/N - one copy of curl - wavy coat
N/N - no copies of curl - straight coat


Scientific references:

Cadieu E, Neff MW, Quignon P, Walsh K, Chase K et al (2009) Coat variation in the domestic dog is governed by variants in three genes. Science 326, 150-153

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