Artist's Illustration of An X-Chromosome (image) California Institute of Technology Share Print E-Mail Caption This is an artist's illustration of an X-chromosome. Caltech scientists developed a "molecular microscope" to study a new class of RNA gene and uncovered how an RNA can orchestrate the silencing of all genes across an entire chromosome. Credit Lance Hayashida/Caltech Office of Strategic Communications Usage Restrictions With attribution Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.