The Geep is an animal produced by combining the embryos of a sheep and a goat. The resulting animal has cells of both goat and sheep origin. The hybrid of the mating of a goat and sheep is also at times, incorrectly, referred to as a Geep.
The first reported results of Geep chimeras created by research scientists at the Institute of Animal Physiology in Cambridge, England was in 1984. In this study the researchers combined the embryos of a goat and a sheep. The Geep parts that grew from the goat embryo were hairy while those that grew from the sheep embryo were wooly. By combining embryos, each cell keeps the charscteristics of it's own species. Thus the resulting animal essentially has four parents. The two parents that created the sheep embryo and the two parents that created the goat embryo. This is in contrast to the hybrid anaimal that arises out of the normal mating of a sheep and a goat, with only the two parents.