For Example: Cats and Dogs, Why can’t they breed?
As there are a few animal hybrids such as:
Wolphin-Whale and Dolphin (Father-Whale, Mother-Dolphin)
Zeedonk-Donkey and Zebra (Father-Zebra, Mother-Donkey)
Zorse-Horse and Zebra (Father-Zebra/Horse, Mother-Zebra/Horse)
Cama-Llama and Camel (Father-Camel, Mother- Llama)
Hinny-Horse and Donkey (Father-Horse, Mother-Donkey)
Mule-Horse and Donkey (Father-Donkey, Mother-Horse)
Liger-Lion and Tiger (Father-Lion, Mother-Tiger)
Tigon-Lion and Tiger (Father-Tiger, Mother-Lion)
They are the ones I know anyway, I’m sure there aren’t anymore.
Anyway it was just a curiosity as if they can all breed why can’t Cats and Dogs and other animals?
If Anybody Could Answer That Would Be Great!
In order for two different species to be able to interbreed, they must be closely related. Generally, animals within the same genus can interbreed – for example, that most famous of hybrids, the mule, is a cross between a male donkey and female horse, both of which belong to the genus Equus. Depending on how closely related they are, species in different genera but the same family can sometimes interbreed too – for example, the puma and the leopard both belong to the family Felidae, but the genera Puma and Panthera respectively, and can interbreed to produce a hybrid known as a pumapard. Hybrids are much more common in captivity than in the wild, as we can house together or artificially inseminate animals that would not naturally encounter one another, but hybrids do sometimes occur in the wild – for example, wolf-coyote hybrids in North America.
Being closely related basically means that two species share a greater amount of genetic material with each other than with other animals. Beyond family level, two species cease to share enough genetic material for the egg and sperm to ‘recognise’ each other, which is why you can’t breed animals from different families like, say, a dog and a cat – a dog sperm simply wouldn’t be able to fertilise a cat egg, and vice versa.
Most hybrids are sterile, whether they are between species in the same genus or those in different genera. This is because the parent species often have different numbers of chromosomes, which means the hybrid cannot produce functional sex cells. When two different species can interbreed and produce fertile young, it is an indication that they are very closely related. This is the case with all members of the genus Canis – wolves, dogs, dingoes, coyotes and jackals. Because members of different genera are more distantly related, there is less chance of them producing fertile young, but it does happen. An example is the Bengal cat, a fertile hybrid between a domestic cat and a leopard cat. Whilst the leopard cat was fomerly placed in the same genus as the domestic cat, Felis, it is now placed in Prionailurus, making the Bengal cat a fertile inter-genus hybrid.