Describe the inductive and molecular signals involved in the specification of the dorsal-ventral and anterior-posterior axes as found in amphibian embryos. What early embryological experiments showed the importance of the cells derived from the grey crescent region of the embryo? How did these earlier findings inform subsequent molecular studies of axis formation in vertebrate embryos? 

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Specification of Axes in Amphibian Embryos and the Significance of Grey Crescent Cells 1 DorsalVentral Axis Specification Inductive Signals In amphibian embryos the dorsalventral axis is specified thr... View the full answer