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胚胎干细胞是两性的。Embryonic stem cells are totipotent.

对扩增后的ES细胞进行染色体和全能性检测。The totipotent and chromosome of the expanded ES cells were also examined.

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此时胚胎的细胞数较少，但都是全能细胞。At this point a small number of embryonic cells, but they are still totipotent cells.

在受精后的头几个小时里，受精卵分裂成具有相同分化能力的细胞。In the first hours after fertilization, this cell divides into identical totipotent cells.

人类的发展是从一个精子和一个卵子结合形成受精卵开始的。Human development begins when a sperm fertilizes an egg and creates a single totipotent cell.

在体细胞克隆过程中，供体细胞核必须先去分化，再重编程为具有全能性的胚胎模式。In SCNT, the somatic nuclei must be remodeled from highly differentiated patterns to a totipotent embryonic pattern.

但是为制作真正的克隆，一个细胞不仅要是多功能的，还必须是全能的，进而能转化成完整的动物。But to make a true clone a cell needs to be not just pluripotent, but totipotent and thus able to turn into an entire animal.

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在受精后并经历了四天的细胞分裂周期后，这些细胞开始具有特殊性。Approximately four days after fertilization and after several cycles of cell division, these totipotent cells begin to specialize.

全能细胞能够专门化胚外膜和组织，胚胎和所有胚胎后组织和器官。Totipotent cells have the capacity to specialize into extraembryonic membranes and tissues, the embryo, and all postembryonic tissues and organs.

哺乳动物着床前胚胎发育最基本的问题之一是高度分化的卵母细胞如何过渡到全能性的卵裂球。The transition of the highly differentiated oocyte into the totipotent blastomeres is a fundamental process during the development of mammalian preimplantational embryo.

到目前为止，尚不清楚在早期发育的哪一个阶段胚叶细胞不再是全能细胞—可以形成躯体各种细胞类型的细胞。There was, until now, uncertainty about which stage of early development the blastomeres ceased to be totipotent , i. e. able to develop into all cell types of the body.