Chromosome Change (IMAGE) Brown University Caption Chromosomes 4 (red) and 18 (green) are noticeably smaller in the nucleus of a senescent cell (right) than in a nonsenescent cell (left). Credit Image: Nicola Neretti/Brown University Usage Restrictions with credit 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.