B-locus – Border Collie
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Code: BLOK
The tested variant causes brown coat colour in many breeds, in Rhodesian Ridgebacks it causes brown nose ("livernose"), mucous membranes and claws.
Inheritance is autosomal recessive (black colour is dominant).
Gene and tested mutations/variants
TYRP1, (bs - c.991C>T; bc - c.121T>A; bd - c.1033_1035del)
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