Alleles donít necessarily come in two forms only!
There are actually three alleles of the gene for dark base color: B, b, and bí (pronounced ìb-primeî).
Black (B) is dominant to medium brown (b) and light brown (bí)
- Technically, thereís no such thing as a ìblack catîówhat we call black is actually an extremely dark brown
Medium brown is dominant only to light brown (bí)
- Cat breeders call these coat colors ìchocolateî and ìcinnamonî