![Three people smiling.](https://webarchive.library.unt.edu/web/20120927113413im_/http://www.nlm.nih.gov/medlineplus/magazine/issues/spring07/images/genetics.jpg)
The Genetics Home Reference (GHR) Web site — ghr.nlm.nih.gov — is a free, trustworthy, patient-friendly guide to the science of genetics. The site has over 500 topics on genetic conditions and related genes, and an illustrated tutorial that explains the basics of genetics and a glossary of genetics terms.
Physicians can order free "InfoRx" prescription pads for the Genetics Home Reference site at informationrx.org.
The Web site is produced by the National Library of Medicine (NLM). The prescription pad is a joint program by the NLM and the National Institute of Child Health and Human Development, both of the National Institutes of Health, as well as the American Academy of Pediatrics, the American Academy of Family Physicians, the American College of Obstetricians and Gynecologists, and the American College of Medical Genetics.