A) Results of chimeric explants. B) Summary of results. Different rows represent different sources of epidermis: E7 dorsal skin epidermis (normally feather forming), E9, E11 and E12 metatarsal skin epidermis (normally scale forming). Different columns represent different sources of mesenchyme: E7 dorsal skin mesenchyme (normally feather inducing), E9, E11 and E12 metatarsal skin mesenchyme (normally scale inducing). We can observe the gradual restriction of epidermal plasticity and the beginning of dermal complexity, echoing what we see in Fig. 1B. Red, feather derived tissue; blue, scale derived tissue.