C. elegans nerve system is labeled with GFP to show the neuronal interconnectivity. C. elegans has a simple and well-defined nerve system that includes 302 neurons. See also more information on C. elegans neuron research. Courtesy of the C. elegans Worm Art Show.
Physical and functional unit of heredity which carries information from one generation to the next. In molecular terms, it is the entire DNA sequence – including exons, introns, and noncoding transcription-control regions – necessary for production of a functional protein or RNA.