Dogs were the first of any species that people domesticated, and they have been a constant part of human life for millennia.
Live Science on MSN
Most modern dogs have wolf DNA from relatively recent interbreeding. Here's which breeds are the most and least 'wolfish.'
The wolf DNA isn't left over from when dogs and wolves diverged; instead, it most likely came from interbreeding in the past ...
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Scientists Discover Detectable Wolf DNA in Two-Thirds of Dog Breeds, Including Tiny Chihuahuas
U.S. scientists analyzed the DNA of numerous modern-day dog breeds, and found that two-thirds of pet dogs have traceable wolf ...
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