This red fox experiment has been in the works for almost 60 years. The foxes are bred in captivity and then put into one of three groups for genotyping. These groups are the Tame, conventional, and aggressive populations. The foxes have the same window of DNA genotyped, while researchers look for the presence of a "friendliness" gene. Then once the fox's genes have been assessed, a physical test is made to back up the results. What is noted is that the domesticated fox isn't like a dog, they are anxious and curious and they are not like dogs at all.
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