Abstract
The Genetics Society of America Medal honors an individual member of the Society for outstanding contributions to the field of genetics in the last 15 years. Genetics Society of America established the Medal in 1981 to recognize members who exemplify the ingenuity of the Genetics Society of America membership through elegant and highly meaningful contributions to modern genetics. The 2021 Genetics Society of America Medal has been awarded to Douglas Koshland of the University of California, Berkeley. His advances in chromosome biology have not only illuminated fundamental features of the structure of chromosomes but also provided tools for many others to use.