To ensure that two completely different species to have the ability to interbreed, they should be carefully associated. Typically, animals inside the identical genus can interbreed – for instance, that almost all well-known of hybrids, the mule, is a cross between a male donkey and feminine horse, each of which belong to the genus Equus. Relying on how carefully associated they’re, species in numerous genera however the identical household can typically interbreed too – for instance, the puma and the leopard each belong to the household Felidae, however the genera Puma and Panthera respectively, and might interbreed to supply a hybrid referred to as a pumapard. Hybrids are far more widespread in captivity than within the wild, as we will home collectively or artificially inseminate animals that will not naturally encounter each other, however hybrids do typically happen within the wild – for instance, wolf-coyote hybrids in North America.
Being carefully associated principally signifies that two species share a higher quantity of genetic materials with one another than with different animals. Past household stage, two species stop to share sufficient genetic materials for the egg and sperm to ‘recognise’ one another, which is why you’ll be able to’t breed animals from completely different households like, say, a canine and a cat – a canine sperm merely would not be capable of fertilise a cat egg, and vice versa.
Most hybrids are sterile, whether or not they’re between species in the identical genus or these in numerous genera. It’s because the father or mother species usually have completely different numbers of chromosomes, which implies the hybrid can’t produce useful intercourse cells. When two completely different species can interbreed and produce fertile younger, it is a sign that they’re very carefully associated. That is the case with all members of the genus Canis – wolves, canines, dingoes, coyotes and jackals. As a result of members of various genera are extra distantly associated, there’s much less likelihood of them producing fertile younger, but it surely does occur. An instance is the Bengal cat, a fertile hybrid between a home cat and a leopard cat. While the leopard cat was fomerly positioned in the identical genus because the home cat, Felis, it’s now positioned in Prionailurus, making the Bengal cat a fertile inter-genus hybrid.
Supply(s): I was a zookeeper and have studied animals all my life.