The "Agouti" gene, with its dominant "A" allele and recessive "a" allele, controls the coding for agouti signaling protein (ASIP; ). The wild-type "A" produces the agouti shift phenomenon, which causes hairs to be banded with black and an orangish/reddish brown, this revealing the underlying tabby pattern (which is determined by the "T" alleles at the separate tabby gene). The "non-agouti" or "hypermelanistic" allele, "a", does not initiate this shift in the pigmentation pathway and so homozygotes "aa" have pigment production throughout the entire growth cycle of the hair—along its full length. As a result, the non-agouti genotype (aa) is solid and has no obvious tabby pattern (sometimes a suggestion of the underlying pattern, called "ghost striping", can be seen, especially in bright slanted light on kittens and on the legs, tail and sometimes elsewhere on adults). "Agouti" is found on chromosome A3.