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It doesn’t take a scientist to tell you that golden retrievers are usually friendly and that you shouldn’t aggravate a pit bull.
Duh
Duh indeed, but there are still people declaring that "breeds don't mean anything - all dogs are the same".
The lead author of the bioRxiv preprint, Evan MacLean, Ph.D., is a comparative psychologist at the University of Arizona in Tucson and the owner of two dogs with big personalities, a Labrador retriever (friendly, active, outgoing, according to the American Kennel Club), and a Yorkshire terrier (affectionate, sprightly, tomboyish). In his study, he compared the personalities of 17,000 dogs of different breeds with the genomes of around 5,700 dogs to find a relationship between DNA and their traits. He found multiple: 131 sections of dog DNA that line up with 14 personality traits, across breeds.
“Our findings suggest that there are certainly genetic influences on dog behavior, and dog owners are never working with a ‘blank slate’,” MacLean tells Inverse.
https://www.inverse.com/article/52299-do-dogs-have-personality-dna-says-yes