The reason why wolves and dogs can mate

Wolves and dogs can mate because dogs are one of the descendants of gray wolves. Both wolves and dogs belong to the Canidae family and are animals of the same species. All of them can mate. For example, a lion and a tiger in the same family of cats can give birth to a liger; a horse and a donkey in the same family of the equid can give birth to a mule; and a whale and a dolphin can give birth to a cetacean, so Dogs of the same type can mate, including wolves and dogs.