The melanocortin 1 receptor gene (MC1R) is responsible for the deposition of pigment in hair. Recessive alleles of this gene produce bright red to yellow coat pigmentation. An MC1R mutation described in Kurilian Bobtail cats is associated with the "copal" coat color, expressed as warm red at first, followed by a transition to an apricot-like shade during the first year of life.
MC1R
Autosomal recessive (compound heterozygocity)
Kurilian Bobtail
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