Thomas P. Powers

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The genealogy of vertebrate Hox genes and clusters has long fascinated evolutionary and developmental biologists alike. The importance of Hox genes is underscored by their involvement in axial patterning, their spatial colinearity of gene order with respect to expression domains and their likely interconnection with morphological evolution [1]. Whereas the(More)
The Hox genes have been found to encode transcription factors, which specify the morphological identity of structures along the anteroposterior axis of animals ranging from worms to mice. The canonical set of nine genes is organized in a cluster in the genome of several protostomes and deuterostomes. However, within insects, whereas the Hox genes are(More)
Preprint The living coelacanth is a lobe-finned fish that represents an early evolutionary departure from the lineage that led to land vertebrates , and is of extreme interest scientifically. It has changed very little in appearance from fossilized coelacanths of the Cre-taceous (150-65 million years ago), and is often referred to as a " living fossil. " An(More)
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