Up until a short time ago the Y chromosome played the role of the juvenile delinquent within human chromosomes. It was considered to be rich in junk, short on genes, and rapidly degenerating. Now the Y chromosome is growing up by providing a means for investigating human migration. Through the use of genetic markers on the Y chromosomes, students from a college bioinformatics course were able to determine the migration routes over tens of thousands of years from the 100+ male DNA samples they collected. (Contains 5 figures and 3 tables.)