Cancer Chromosomes (Cytogenetic Databases)
http://www.ncbi.nlm.nih.gov/sites/entrez?db=cancerchromosomes

The Cancer Genome Anatomy Project (CGAP)
http://cgap.nci.nih.gov

Chromosomal Variation in Man Online
http://www.wiley.com/borgaonkar

European Directory of DNA laboratories
http://www.eddnal.com

Frequency of Inherited Disorders Database
http://archive.uwcm.ac.uk/uwcm/mg/fidd/

Chromosome help station (for families with rare chromosome disorders)
http://www.chromosomehelpstation.com

Ciência Hoje, ciência e tecnologia em directo
http://www.cienciahoje.pt/index.php

Cytogenetics (Pathology Server)
http://www.pathology.washington.edu/cyto_page.html

Cytogenetic Resources
http://www.kumc.edu/gec/geneinfo.html

E.C.A. Register of Unbalanced Chromosome Aberrations (ECARUCA)
http://www.ecaruca.net

EDNAP Mitochondrial DNA Population Database
http://www.empop.org

ENFSI DNA WG STR Population Database
http://www.str-base.org/index.php

Forensic Chromosome X Research
http://www.chrx-str.org/

GeneTests
http://www.genetests.org

GENDIA
http://www.gendia.net

National Centre for Biotechnological Information
http://www.ncbi.nlm.nih.gov

OBGYN.net
http://www.obgyn.net/intro.asp

On-line Mendelian Inheritance in Man (OMIM)
http://www.ncbi.nlm.nih.gov/sites/entrez?db=OMIM

Orphanet
http://www.orphanet.pt

PubMed: Biomedical Literature Citations and Abstracts
http://www.ncbi.nlm.nih.gov/sites/entrez?db=PubMed

Short Tandem Repeat Internet Database
http://www.cstl.nist.gov/div831/strbase

Single Nucleotide Polymorphisms Database
http://www.ncbi.nlm.nih.gov/sites/entrez?db=Snp

U.S. Department of Energy Genome Program
http://genomics.energy.gov/

Y-STR Haplotype Reference Database
http://www.ystr.org/

YHRD - Y Chromosome Haplotype Reference Database
http://www.yhrd.org/index.html