Scientists find key 'friendliness' genes that distinguish dogs from wolves - LA Times
"Your dog is basically a super social wolf, and scientists may have found the gene that makes him want to cuddle with you.
A new study shows that friendliness in dogs is associated with the same genes that make some people hyper-social.
The study, published this week in the journal Science Advances, found that structural variations in three genes on chromosome 6 are correlated with how much canines socialize with humans.
An analysis of DNA from two dozen animals revealed that these genes look very different in dogs than they do in wolves..."