Yeast Cell during Cell Division (IMAGE) University of Toronto Caption A dividing yeast cell making a copy of its DNA, shown in green. Cells could be accumulating more mutations during DNA replication that previously appreciated. The red colour marks the nuclear envelope surrounding the DNA. Credit David Gallo Usage Restrictions credit author 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.