The mackerel sample and its Tm allele at the tabby gene locus is dominant more than the traditional (or blotched) allele, Tb. So a cat having a TmTm or TmTb genotype sets the basic pattern of slim stripes (mackerel tabby) that underlies the coat, whilst a TbTb cat will https://www.etsy.com/listing/1445209781/personalized-cat-lover-gift-tabby-cat