DNA is a double base pair composed of two base pairs that are parallel to each other and paired with each other.Strand helical structure. The human genome is about 3 billion base pairs,exons(exome) about all base pairs1.5%, the research found that if theoccur about 85% of genetic diseases caused DNA mutationsSequence variations in exonic regions,Sequencing exon regions will be more efficient in the fields of biomarkers and genomicsresearch