Chromosome Encased in a Micronucleus (IMAGE) Dana-Farber Cancer Institute Caption Panel A is a microscope image showing a single, abnormally attached whole chromosome (in white) in a cell preparing to divide. Panel B shows an abnormally attached chromosome (indicated by arrow) lagging behind the other chromosomes during cell division. Panel C shows the lagging chromosome ending up encased in a micronucleus and is stranded outside the primary cell nucleus. Credit Neil Ganem, Ph.D. Usage Restrictions None 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.