Figure 2

Re-orientation of the hallux.
(a) Quail embryo stained with Alcian Blue, showing the small size and position of the hallux in the early stages of cartilage development (HH30); (b) Dorsal and medial views of Alcian Blue/Alizarin Red stained feet skeletons of quail embryos showing changes in the orientation of the hallux; (c) Details of hallux skeleton in dorsal view; (d) Details of hallux skeleton in medial view; (e) Diagram picturing the changing orientation of MT1 between HH32 and HH36 in relation to MT3 and MT2.