OMIM is a comprehensive, authoritative database that features catalogs of autosomal dominant, autosomal recessive, x-linked, y-linked, and mitochondrial phenotypes. Includes information on human genes and genetic disorders. The full-text, referenced overviews in OMIM contain information on all known mendelian disorders and over 12,000 genes.
Online Mendelian inheritance in man (OMIM)
OMIM - NCBI
OMIM - Online Mendelian Inheritance in Man