Mule & Hinny
A mule is a member of the horse family. A mule is a cross between a male donkey and a female horse, while a hinny is a cross between a male horse and a female donkey, but is not the name of a female mule. Mules are more common than hinnies. Because horses and donkeys have different numbers of chromosomes,all male and most female mules and hinnies are infertile crossbreeds.