Chromosome Traffic Cop (image) University of Iowa Share Print E-Mail Caption University of Iowa biologists have found a protein that appears to control the speed at which female (maternal) and male (paternal) chromosome strands move and pair up. The image on the left shows chromosomes (in blue) aligning and pairing (indicated in red). In the image on the right, the controlling protein has been removed, and less pairing has occurred. Credit Sarit Smolikove, University of Iowa Usage Restrictions None Share Print E-Mail 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.