Sex chromosomes with apes (IMAGE) Penn State Caption Newly generated, complete genomes for the sex chromosomes of six primate species — produced by an international collaboration led by researchers at Penn State and the National Human Genome Research Institute — reveal rapid evolution on the Y chromosome among apes. These results may inform conservation of these endangered species and shed light on sex-related genetic diseases in both humans and our closest living relatives. Credit Design: Bob Harris; Photography: San Diego Zoo and Tulsa Zoo Usage Restrictions Credit must be given to the creator. No derivatives or adaptations of the work are permitted. License CC BY-ND 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.