Dogs are the most loyal friends of mankind, and now dogs can be seen almost everywhere. From the word "V" created by our ancestors, we can see that people and dogs can't give up their feelings.
Dogs originated from wolves, and have become a * * * knowledge. But where did dogs originate and when did they evolve from wolves? When did the wolf gradually get away from the mountains and step into the temple to become a dog?
After analyzing the DNA of 654 dogs from Europe, Asia, Africa and North America, scientists have come to a conclusion that the East Asian grey wolf, once active near China or China, is considered as the ancestor of almost all domestic dogs in the world today. Wolves were domesticated as dogs by humans about10.5 million years ago and gradually spread all over the world.
Origin: The ancestors of dogs are wolves in East Asia.
In the authoritative scientific journal of the United States, a scientific report jointly completed by scientists from Sweden, the United States and China shows that more than 20,000 years ago, medium-sized Asian wolves appeared and began to contact with humans. These wolves are the ancestors of more than 400 domestic dogs in the world. Wolves living near China or China were domesticated by human communities, and the descendants of these wolves were eventually domesticated into dogs by humans 6,543,800+5,000 years ago.
Wolves are the ancestors of dogs, and there is also a very controversial and powerful evidence that the offspring of wolves and dogs have reproductive ability and are very similar in hematology. As a result, the role of the wolf in most movies is composed of dogs, which is almost unrecognizable by ordinary people.
The evolution from wolf to dog took a long time.
Alliance: Dogs actively choose to go to people.
The research results of scientists show that at the beginning of the alliance between man and wolf (or dog), it was not man who chose the wolf (or dog), but the wolf took the initiative to go to man and was domesticated as a dog.
The answer may be this: 25 or 30 wolves and a similar number of nomadic ancestors walked through the wilderness in tandem. When people hunt large prey, wolves wander around people's camps, picking up leftovers and eating bones, which further proves that they are not aggressive or can be good helpers.
As a result, some young or less threatening wolves slowly occupied people's hearts, and the alliance between man and wolf was born. People adopted them, let them reproduce, and the history of domestication began.
Crossbreeding: Dogs of different shapes were born.
The results of scientists' research show that, except for the early variation of dogs to adapt to the requirements of human beings and the influence of the environment, most kinds of dogs come from the hybrid improvement of dogs by human beings for thousands of years.
According to Jeff sampson, a molecular geneticist and gene research director of the Dog Breeding Association, dogs have 78 chromosomes, far more than 46 in humans, so the chances of hybridization and pairing are relatively increased, which is not suitable for humans. People selectively breed and cross dogs according to their needs, so as to gradually cultivate specific kinds of dogs.