X-linked recessive inheritance: In cats, one gene for coat color is X-linked. Male cats are either black, XBY, or orange, XbY depending on which allele they carry. Females are black (XBXB), orange (XbXb) or tortoise-shell (XBXb) (mosaic patches of black and orange), with the tortoise-shell phenotype resulting from the heterozygous […]