Microarray chips test a small percentage of SNPs on the human genome. Each letter the DNA code for the human genome (A, C, T, or G) is called a base pair. This one tested a total of 550,000 SNPs. Launched in the first quarter of 2006, it was designed using SNP markers selected from the HapMap and 1000 Genomes projects. Its intended use was medial genetics association studies (GWAS).
SNPs per Million Base Pairs – Heatmap
The V2 chip tested 550,000 base pairs across the human genome. This heatmap shows how those SNPs are distributed across the 22 autosomal chromosomes and the X-chromosome. The ranges are for counts of tested SNPs in blocks of 1 million base pairs.
Created with Kitty Cooper's Chromosome Mapping Tool