23andMe V2 Chip

///23andMe V2 Chip

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23andMe V2 Chip

Background

The 23andMe V2 chip was 23andMe's second microarray chip. It replaced their V1 chip in September 2008. It was almost surely the Illumina HumanHap550 Genotyping BeadChip.

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).

The number of SNP variants tested by chromosome

The number of SNP variants tested by chromosome

Chromosome23andMe V2
143,734
246,065
338,255
433,970
534,586
637,660
730,877
831,474
926,880
1029,817
1127,868
1227,915
1321,281
1418,669
1516,983
1617,271
1715,153
1816,859
1910,105
2014,362
218,336
228,666
X13,828
Y1,880
mt2,019
Autosomal Total556,786
Total574,513

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.

23andMe V2 Chip

Created with Kitty Cooper's Chromosome Mapping Tool

2017-02-03T12:35:22+00:00 September 18th, 2016|Categories: Compendium|Tags: , |
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