两夫妻有夫妻相可能并不一定是偶然,也可能是由于结婚的两个人具有相同的祖先:这对不同人群的基因有着很重要的影响。直到最近,大多数人都会在邻近的地区择偶。经过很多代之后,这种邻近的婚姻关系创造出了一种基因结构,有可能导致这类人群的遗传研究发生偏差。在一项关于美国人多代择偶模式的初 It may not always be the case that two couples have a couple, or it may be because the two married have the same ancestry: this has a significant effect on the genes of different populations. Until recently, most people mate in the neighborhood. After many generations, this proximity to marriage has created a genetic construct that could lead to deviations in the genetic research of such populations. In a beginning on the multi-generational American model