Before revision: Reduction in size is regarded as a domestication syndrome trait - grey wolf skull compared with a chihuahua skull Domestication syndrome refers to two sets of phenotypic traits that are common to either domesticated animals, or domesticated plants.These traits were identified by Charles Darwin in The Variation of Animals and Plants Under Domestication.
After revision: Reduction in size is regarded as a domestication syndrome trait - grey wolf skull compared with a chihuahua skull Domestication syndrome refers to two sets of phenotypic traits that are common to either domesticated