Genetics Home Reference: "All the information on Genetics Home Reference, unless otherwise noted, is written by staff of the National Library of Medicine who have advanced training in genetics and public health, and is reviewed by experts in research and patient care. Genetics Home Reference is published weekly and its content is updated regularly."
MedGen: From NCBI. information related to human medical genetics, such as attributes of conditions with a genetic contribution.
MedlinePlus: (Not to be confused with MEDLINE.) MedlinePlus is a service of the National Library of Medicine (NLM), the world's largest medical library, which is part of the National Institutes of Health (NIH). Their mission is to "present high-quality, relevant health and wellness information that is trusted, easy to understand, and free of advertising, in both English and Spanish."
Mayo Clinic Patient Care and Health Information: The Mayo Clinic is a non-profit medical research center. They provide information on a wide range of diseases on their website; “The Mayo Clinic team of Web professionals, medical reviewers, subject matter experts and other content contributors collaborate to ensure accurate, relevant and actionable information to provide site visitors with access to the knowledge, experiences and services of Mayo Clinic.”
Human Genome Project: Includes projects news, abstracts on gene sequencing and mapping, general information about the project, a molecular genetics primer and much more.
OMIM: Online Mendelian Inheritance in Man. An online catalog of human genes and genetic disorders from Johns Hopkins University.