Robinson (1991) suggested that an allele in TYR causes albinism because other species have the same phenotype associated with TYR mutations. Our analysis of an extended pedigree supports that the albinism phenotype is allelic to full colour (C), burmese (cb) and siamese (cs), suggesting the allelic series C > cb ≥ cs > c based on mutations in TYR. However, sufficient breeding studies have not been performed to confirm the allelic series in cats, specifically, the interaction of full colour and burmese with the albino allele. This evidence concerns the gene TYR and albinism.