BeadChip for studying genetic variation

BeadChip for studying genetic variation

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Caption: BeadChip for studying genetic variation. SNP50 BeadChip (black, lower centre) used to detect single nucleotide polymorphisms (SNPs) in an organism's genetic sequence. Close-up images of the beads on the chip can be seen in the background. SNPs are single nucleotide variations in a DNA (deoxyribonucleic acid) sequence. For a variation to be an SNP it must occur in at least 1% of the population. Each chip has the capability of testing just under 80 million DNA-coated glass beads, allowing Agricultural Research Service (ARS) researchers to test 60,000 genetic locations at once.

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