Gordon Lark and Mopsa (image) University of Utah Caption University of Utah biologist K. Gordon Lark holds his dog, Mopsa, a Portuguese water dog with wavy hair. President Obama's dog Bo is a Portuguese water dog with curly hair. Lark was part of a team, led by National Institutes of Health geneticists, that showed variations in three genes account for seven major kinds of dog coats. Lark and colleague Kevin Chase helped find the gene responsible for curly hair or wavy hair. Credit Sean Graff, seangraff.com Usage Restrictions Credit must be used as shown. 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.