Wolves originated from the earth 5 million years ago. Both dogs and wolves have 39 pairs of chromosomes, which is 78. A pair of chromosomes is missing from the black-backed wolf. In the long process of evolution, many powerful animals were extinct, but wolves survived because they lived in groups and hunted in groups, forming a huge society. Perhaps, as Darwin said, "Natural selection, survival of the fittest".
Extended data
Wolves are wild ancestors of domestic dogs and widely distributed terrestrial mammals, occupying Eurasia, North America and even North Africa. Previous studies have shown that wolves have a complex phylogeny and group history, which is not only influenced by geography and ecological environment, but also has obvious and long-term gene exchange and group mixing with domestic dogs, coyotes and even jackals.
In China, wolves not only live in Qinghai-Tibet Plateau, Northeast China, Xinjiang, Inner Mongolia and other places, but also distribute in the south. Wolves in southern China are an independent group, which is different from wolves in northern China and Qinghai-Tibet Plateau and has the closest relationship. Secondly, the study also found that there is a genetic component in the individual genome of wolves collected from Zhejiang Province, which may come from another species of Canidae, and the divergence time is longer than that of wolves and Asian jackals.
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