Advances in Genetics has established itself as an outstanding vehicle for the dissemination of research results in genetics. Once again, authoritative papers are presented here, beginning with a review by Rai and Black highlighting the salient features of mosquito genomes and their evolution. The recent progress which has been made by the cloning and characterization of two cooperating partners of the Neurospora blue light signal transduction chain is presented by Linden, Balario, Arpaia, and Macino. The emergence of the concept of X-linked mental retardation (XLMR) is discussed by...