Affymetrix Inc. has unveiled its Genome-Wide Human SNP Array 6.0. The single microarray measures more than 1.8 million markers for genetic variation, enabling more powerful whole-genome association studies by genotyping more markers from more individuals. The array contains more than 900,000 single-nucleotide polymorphisms (SNPs) and more than 946,000 nonpolymorphic probes for the detection of copy number variation. It enables better detection of genes associated with a variety of complex diseases affecting multiple ethnicities because it includes genetic variations that extend beyond the International HapMap Project. The same array can be used to test multiple study or disease hypotheses simultaneously, and the same meta-analysis can be used across multiple groups. Featuring improved data analysis algorithms, the array is used with the Affymetrix Genotyping Console software for whole-genome genetic analysis and quality control.