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The animal head is a complex structure where numerous sensory, structural and alimentary structures are concentrated and integrated, and its ontogeny requires precise and delicate interactions among genes, cells, and tissues. Thus, it is perhaps unsurprising that craniofacial abnormalities are among the most common birth defects in people, or that these defects have a complex genetic basis involving...
The origin of new genes and of new functions for existing genes are fundamental processes in molecular evolution. Sdic is a newly evolved gene that arose recently in the D. melanogaster lineage. The gene encodes a novel sperm motility protein. It is a chimeric gene formed by duplication of two other genes followed by multiple deletions and other sequence rearrangements. The Sdic gene exists in several...
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