Dogs and wolves are the same species, where do all the dogs on Earth originate?

Biologically, dogs and wolves belong to the same species, and the dog itself is one of the subspecies of the gray wolf, both dogs and wolves have 39 pairs of chromosomes, and the genome similarity is as high as 99%, and the two can reproduce offspring, and most of the offspring are also fertile.

The domestication of wolves by humans first occurred 30,000 years ago, from the gray wolf, which is a form of cooperation between organisms.

Gray wolves survive in the wild and need to take various risks to forage for food, human ancestors hunted also risked their lives, after humans domesticated wolves, dogs can assist humans in hunting, and at the same time can protect our safety while humans are resting, in return, humans provide dogs with stable food**.

Scientific research shows that all dog species in the world originated in the Yangtze River basin of China 10,000 years ago, from the ancestors of the Chinese to domesticate the gray wolf, and then the domestic dog migrated to the world, forming today's dogs.

After tens of thousands of years of evolution, some dogs containing violent and wild genes have been eliminated by humans, and only the characteristics that are beneficial to humans have been retained, and at the same time, dogs have evolved a variety of breeds for humans to choose from because of genetic mutations.

30,000 years is too short for a species, reproductive isolation has not been formed between dogs and wolves, and even in biological classification, the two are the same species, which can reproduce, the genome similarity of dogs and wolves is as high as 99%, and the genome similarity with gray wolves is even higher.

In contrast, the genomes of humans and chimpanzees are 98% similar and began to separate 10 million years ago, but chimpanzees have 24 pairs of chromosomes, one more than humans (23 pairs), so there is reproductive isolation between humans and chimpanzees, which belong to different species in the family Hominus.

Studies have shown that human ancestors about 6 million years ago, two medium-length chromosomes were aberrated and joined to form chromosome 2, which is a very long chromosome, accounting for 8% of human genes and having 100 million base pairs.

All dogs on the earth originated in China's Yangtze River basin 10,000 years ago, and were domesticated by the ancestors of the Chinese, and then spread to the world and were classified.

Dogs and wolves are the same species, all dogs on the earth originated from gray wolves, human ancestors domesticated gray wolves, provided food to dogs, dogs in return, to protect the safety of humans.

It's the same species. Dogs and wolves do not belong to the same animal but belong to the same species and both belong to the canine family.

Canines. There are 36 species in 13 genera worldwide. Including dogs, wolves, jackals, foxes, etc.

Canines are medium-sized, well-proportioned, with slender limbs and toe-walking behavior, which is conducive to fast running. The head and palate are pointed, the face is elongated, the nose is prominent, the ears are pointed and erect, the sense of smell is sensitive, and the sense of hearing is well developed. Well-developed canines and fissures;The upper molars have a distinct cusp, and the lower molars have a small cusp and heel cusp on the medial sideThe diameter of the crown of the molars is greater than the height of the lateral incisors;The tooth type is.

The hair is coarse and long, and generally does not have a pattern.

4-5 toes on the forefoot and 4 toes on the hind foot;The claws are thick and blunt, not retractable or slightly retractable. The tail is hairy and generally more developed. The anatomy has evolved into a form that is particularly suitable for hunting.

The ancestor of the cat is the arboreal mammal - the small ancient cat, also known as the ancient cat or the fine tooth, it appeared in the middle of the Paleocene 40-50 million years ago, most of them live in the modern North American continent, carnivorous mammals are branch species that evolved from the small ancient cat.

The ancestors of cats are called steppe cats, and European cats are called Olin cats, and the time can be traced back to primitive societies, when we can find cats as animals.

It may be the ancient cat, this animal is relatively small, very similar to cats, and has existed for a relatively long time, about 50 million years ago.

Dogs are the ancestors of wolf Yingchun, and they all belong to the canine family primitive people in the process of migration and hunting, and found that some wolves have fallen behind and cannot keep up with the wolves. By the time humans learned about the use of fire, these scattered wolves surrounded the crowd. They seemed to be shy, so they fed them the scraps of meat they had eaten, and when the wolves were full, they followed the humans to hunt

Slowly, the women brought back the wolf cubs they gave birth to and raised them, and gradually multiplied, so they gradually evolved into dogs.

Later, human beings successively improved and purified more than 350 different dog breeds, including those who care for the household, those who serve as guards, those who lead the way, those who hunt, those who use toys, and those who shepherd sheepEven now, there are dogs that specialize in sniffing drugs, or for the disabled, handicapped and spine-intolerant.