Embryology
Embryology
Hans Spemann

Organizing the embryo

Spemann's organizer - video

WNT homepage, WNT @ wikipedia, video, video

Beta-catenin @ wikipedia

Primitive knot @ wikipedia

Sonic hedgehog, Noggin

Choanoflagellates, Placozoans

HVP Wilson - porifera, Homeobox genes

Eyeless, Evolution of the ear