In fact, most modern breeds are the result of humans breeding cats for their favorite hair patterns. (sciencedaily.com)
As humans bred dogs to meet their own specifications, the genes controlling disease tagged along into the next generation with the genes controlling desirable characteristics such as dreadlocks and double toes. (amcny.org)
Eugenics, or selective human breeding, was a surprisingly popular idea at the beginning of the 20th century. (religion.blogs.cnn.com)