Contents

11 October 1991
Vol 254, Issue 5029

About The Cover

Model systems are vital for carrying scientists toward their goal of understanding the human genome. This issue presents a wall chart (pages 247) summarizing progress in mapping the human genome and one of the classic model systems, Drosophila melanogaster. In addition, there is a special news feature on genome databases (pages 201) as well as articles, reports, and a perspective relating to genome analysis. [Cover illustration by R. J. Kaufman, Charlotte, North Carolina]