The gene silences the xi chromosome by spreading along the xi and inhibits most of its gene transcription . . due to the important role it played in the inactivation process , xist is gradually becoming a hot spot . 由于其在x染色体失活中的重要作用，对xist的研究一直是近几年的研究热点。其中很重要的一点就是试图建立xist染色体在发育过程中的时空转录模式。
By establishing the transcription pattern of the preimplantion embryos , this experiment not only helped to explain some of the x chromosome inactivation phenomena , but also furnished the researcher who were dedicated to the research of reprogramming of somatic cloning and preimplantation development with useful materials and references 本论文不仅建立了xist基因在小鼠胚胎早期发育过程中的转录模式，为解释x染色体的失活提供了理论依据，而且，也为体细胞克隆胚胎的重新编程和早期胚胎的发育提供了有益参考。
Now autosomal and y - chromosomal strs are widely researched and applied , while the x - str markers are not . because x chromosome has the character that the male transmits his x chromosome only to his daughter ( s ) , it can provide more information than the autosomal does , particularly in complex cases of kinship testing 而在解决一些复杂的亲缘关系案件(如单亲父女关系的鉴定和缺乏双亲的姐妹亲缘关系的鉴定)时,由于父亲的x染色体具有只传给他的女儿(们)的遗传特性,因此在解决此类案件时有常染色体所无法比拟的优点。
