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Genetics Home Reference: your guide to understanding genetic conditions About   Site Map   Contact Us
A service of the U.S. National Library of Medicine®
  • Newborn Screening

Detecting genetic disorders for early treatment

  • In the Spotlight

Genetic Disorders A to Z
and related genes and chromosomes
Concepts & Tools
for understanding human genetics
  • Genetic Conditions

The genetics of more than 400 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.

Published: May 4, 2009