In understanding craniofacial development and evolution, transplants of regions of cranial neural crest between quail and duck embryos was used to demonstrate:

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Different embryonic origin of the upper and lower beak from neural crest populations

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Evolutionary differences in beak development from BMP4 expression in the epithelium

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Neural crest cells carry species-specific information to regulate beak size and shape

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Neural crest cell migratory patterns into the different regions of the craniofacial complex

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In understanding craniofacial development and evolution, transplants of regions ...

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