What's New infantile systemic hyalinosis juvenile hyaline fibromatosis mucopolysaccharidosis type II More... Newborn Screening Detecting genetic disorders for early treatment In the Spotlight The Genetic Information Nondiscrimination Act (GINA) Information Rx What is direct-to-consumer genetic testing? Gene Families	Genetic Disorders A to Z and related genes and chromosomes	Concepts & Tools for understanding human genetics
	Genetic Conditions The genetics of more than 350 health conditions, diseases, and syndromes. Genes More than 550 genes, health effects of genetic differences, and gene families. Chromosomes Chromosomes, mitochondrial DNA, and associated health conditions.	Handbook Learn about mutations, inheritance, genetic counseling, genetic testing, genomic research, and more. Glossary Medical and genetics definitions. Resources Links to other genetics information and organizations.

Genetics Home Reference provides consumer-friendly information about the effects of genetic variations on human health.

The resources on this site should not be used as a substitute for professional medical care or advice. Users seeking information about a personal genetic disease, syndrome, or condition should consult with a qualified healthcare professional. See How can I find a genetics professional in my area? in the Handbook.