Tameness is in the genes

Domesticated animals share genetic variants not seen in their wild cousins

tameness genes

TAMED GENES  Choosing animals for tameness also selects genes that may affect appearance, such as having floppy ears. Genetic analysis of rats and minks reveals some genes commonly altered during domestication. 

Rob Swatski/Flickr (CC BY-NC 2.0)

COLD SPRING HARBOR, N.Y.