目的调查DXYS267基因座遗传多态性，研究该座位伴性遗传单核苷酸的特征及其法医学应用价值。
Objective To investigate the polymorphism of DXYS267 locus in China Han population and find the application and characters of its Y-specific single nucleotide substitutions.
科学家们稍后通过利用称为SNP的单核苷酸多态性使遗传图谱更加精细。
Scientists later refined the map by looking for single variations called SNPs or single nucleotide polymorphisms.
研究南阳牛HCRTR1基因编码区单核苷酸多态性，为利用遗传标记进行肉牛选育奠定基础。
One hundred and twenty two Nanyang cattle were used for SNPs discovery in the complete coding region of HCRTR1 gene using PCR-SSCP and sequencing methods.
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