Aneuploidy (IMAGE) University of Luxembourg Caption The yeast Saccharomyces cerevisiae, which normally occurs as a single cell, has the ability to form colonies as it is able to duplicate single chromosomes. Credit (c) LCSB 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.