Effects of domestication (2 of 4)
Black Labrador puppy, by IDS Photos
Catahoula, by Alexpgp
Dalmation, by TMJR
Another effect of domestication is the introduction of new coat colors, as demonstrated by the classic Dmitry Belyaev experiment with silver foxes. The development of new coat colors is thought to be because adrenaline, a hormone involved in stress responses, is on a regulatory pathway that is connected to the production of melanin, a pigment that affects the color of the skin and hair coat.