For example, a black cat may carry a gene for orange fur, and a white cat may carry a gene for black fur. If these two cats mate, it is possible for them to have kittens that are black, orange, or white.
The genetic makeup of the parents determines the specific colors of kittens that are born. In some cases, a single litter of kittens may include multiple different colors, while in other cases, all of the kittens may be the same color.