Word: demerec
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...molecules) strung along the chromosomes in the germ plasm. Thousands of genes controlling various body characteristics have been traced in Drosophila melanogaster, the scientifically celebrated little fruit fly. It is by changes in these genes that evolution of different types of organisms takes place. But last week Dr. Millislav Demerec of the Carnegie Institution's Department of Genetics announced his opinion- based on careful research-that chromosomes contain one gene, which, by affecting all the genes, speeds up the rate of evolutionary change. It may be due to this single "pacemaker" gene that the evolution of higher organisms...
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