According to new studies by scientists, how do the genes of ancient American dogs compare to the genes of dogs born in Europe and Asia?

Scientists found that the genes of the ancient American dogs were similar to the genes of dogs born in Europe and Asia. Scientists also concluded that every breed of dog, from English setters to Labrador retrievers, descended from wolves that lived in Europe and Asia and migrated to North and South America.

reasoning from several particular examples to establish a general principle