Sheep and goats are closely related (both are part of the Caprinae subfamily) and it can sometimes be difficult to tell them apart just by their appearance.

However, they are distinct species, so hybrids are rare and are always sterile. A sterile hybrid of a sheep and a goat is called a geep or shoat and has 57 chromosomes (sheep have 54 chromosomes, goats 60). It should not be confused with the chimeric gene obtained by fusing a goat embryo and a sheep embryo.
Continue reading Sheep Breeds in the World