Centromere (IMAGE) Duke University Caption A schematic figure from the paper illustrates how recombination occurred at the centromere and then genes migrated and fused to leave Cryptococcus with just two sexes, when before it had many. Credit Sheng Sun, Duke University 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.