Sheepgoat chimeras as a general rule may be assumed to be fertile, with the reservations that apply to chimeras generally (which again reflect that the parent embryos may have been of different sex, so that the animal, apart from being a chimera, may also be intersex). But in accordance with the mosaic- (as opposed to hybrid-) nature of the interspecies chimera, any individual sperm- or egg cell it produces must be of either the pure sheep or the pure goat variety. Whether in fact viable germ cells of both species may be, or have been, produced within the same individual is unknown.