genetic marker

genetic-marker的词性：
n.（名词）

1. A known DNA sequence associated with a particular gene or trait that is used to indicate the presence of that gene or trait. Genetic markers associated with certain diseases can often be detected in the blood serum, where their presence is used to determine whether an individual is at high risk for developing a disease.
遗传标识：与特定基因或特性相联的一种已知脱氧核糖核酸序列。该基因或特性常用来辨认跟它相关的基因或特征。与某些疾病相联系的遗传标识常能在血清中被查出，血清中它们的存在被用来检查一个人是否有发展一种疾病的高危险性