An Ancient Gene Network Is Co-opted for Teeth on Old and New Jaws
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An Ancient Gene Network Is Co-opted for Teeth on Old and New Jaws
Vertebrate dentitions originated in the posterior pharynx of jawless fishes more than half a billion years ago. As gnathostomes (jawed vertebrates) evolved, teeth developed on oral jaws and helped to establish the dominance of this lineage on land and in the sea. The advent of oral jaws was facilitated, in part, by absence of hox gene expression in the first, most anterior, pharyngeal arch. Muc...
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ژورنال
عنوان ژورنال: PLoS Biology
سال: 2009
ISSN: 1545-7885
DOI: 10.1371/journal.pbio.1000031