Polak (IMAGE) University of Cincinnati Caption UC biologist Michal Polak studies the competitive race to pass on genes that takes place after multiple males mate with a female. Credit Andrew Higley/UC Creative 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.