Where sexes come by the thousands
- Written by Antonis Rokas, Cornelius Vanderbilt Chair in Biological Sciences and Professor of Biological Sciences and Biomedical Informatics, Vanderbilt University
By the end of every spring semester, students in my introductory biology course at Vanderbilt University have become quite familiar with natural variation in human sex chromosomes. They know, for example, that most females have two...

