Fishing for Clues (IMAGE) Cincinnati Children's Hospital Medical Center Caption This image highlights single RNA molecules that scientists counted in single cells in a developing zebrafish embryo. Genes in the embryo's segmentation clock oscillate, showing high and low expression along the axis of unsegmented tissues. RNA molecules are colored depending on their position in the tissue. The oscillations stop when groups of cells form segments. Cell nuclei are marked by the color gray. Scientists report in Cell Reports their research offer clues into how random gene fluctuations might be tamed during at the earliest stages of when life forms, which could one day help prevent birth defects or cancer. Credit Cincinnati Children's Usage Restrictions Please credit Cincinnati Children's License Licensed content 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.