1·Some changes in DNA occur naturally and lead to no harmful effects; these changes in a population are called polymorphisms.
有些DNA的变化是自然发生的不会产生有害影响；这些在一个群体中的变化被称为多态性。
2·They analyzed more than 1, 400 single nucleotide polymorphisms, or SNPs for short, to see if any particular SNPs were more frequently carried by schizophrenia patients than unaffected people.
他们分析了多达1400个单核苷酸多态性，或简写为SNPs，为了检查精神分裂症患者是否比正常人更频繁地携带了SNPs。
3·These changes in a population are called polymorphisms.
这些在一个群体中的变化被称为多态性。
4·Dr Quintana-Murci's data were drawn from a project called HapMap, which catalogues what are known as single-nucleotide polymorphisms, or SNPs.
Quintana - Murci博士的数据来自人类基因组单体型计划图，旨在对单核苷酸多态性，即SNPs进行归类。
5·Two single nucleotide polymorphisms (SNPs), both located onthe chromosomal region 2p35, had the highest degree of associationwith alcohol dependence in a relatively homogenous patient population.
两个都位于染色体上2P35区域的单核苷酸多态性（SNPs）对于在相关的同种疾病总数的酒精依赖上有着最高程度的相关性。