<p>After the human genome project and total analysis of human genome, Genome-wide association study(GWAS) has made an active advance to reveal which genes are highly related to certain diseases. However, it is still hard to find out and understand various biological pathways and phenomena. Thus, studying Single Nucleotide Polymorphism(SNP) is one of the important pieces for us. SNP is a difference of single specific nucleotide. There are approximately 3,000,000 SNPs in human genome, which appear once in 500~1,000 base pairs. When most people have the base C(cytosine) or G(guanine) at a specific position, some others could have A(adenine) or T(thymine) at the same place. SNPs might be associated with phenotype of individuals and some SNPs may cause diseases.</p>

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