Genetics Home Reference provides consumer-friendly information about the effects of genetic variation on human health.
Learn about the signs and symptoms, causes, and inheritance of more than 1,200 health conditions with a genetic basis.
Find information about the function of more than 1,400 genes and see how changes in these genes are related to health conditions.
Chromosomes & mtDNA
Read about each of the 23 pairs of human chromosomes and mitochondrial DNA (mtDNA).
Help Me Understand Genetics
Explore topics in human genetics, from the basics of DNA to genomic research and personalized medicine.