唯一的区别在于染色体的水平，它埋藏在胚胎细胞的深处。
The only difference is at the chromosomal level, deep inside the embryos' cells.
卵细胞染色体数目错误可能会导致胚胎流产，或导致唐氏综合征之类的严重婴儿病症。
Having the wrong number of chromosomes can cause an embryo to miscarry, or lead to serious medical conditions such as Down's syndrome.
利用四倍体胚胎补偿技术就可以得到完全由ES细胞发育而来的小鼠。
Thus, we can obtain the ES mouse completely from ES cells with the method of tetraploid embryo complementation.
但是，他们可以产生“单系”胚胎干细胞系，带有母系的两组染色体的单系胚胎被称为单性生殖。
They can, however, generate "uniparental" embryonic stem cell lines. Uniparental embryos with two maternal sets of chromosomes are known as parthenogenetic.
将上述定位的鸡的20个功能基因的BAC克隆分别与利用胚胎成纤维细胞制备的鸭和鸵鸟的中期染色体杂交。
The above BAC clones of 20 chicken genes were hybridized by FISH with duck and ostrich metaphase chromosomes prepared from embryo fibroblasts.
目的：探讨人胚胎滋养层细胞中染色体数目异常与着丝粒特异性蛋白质CENP-I表达水平的相关性。
Objective:To observe the expression level of CENP-I gene in human trophoblast cells with numerical chromosomal aberration.
目的探讨四倍体胚胎发育阶段对胚胎干细胞（ES）嵌合体小鼠制备的影响。
Objective To investigate the effects of developmental stages of tetraploid embryos on mouse chimeras from embryonic stem cells (ES).
之后，DrNoggle和DrEgli就能从这个小胚胎细胞得到多能干细胞-但这一细胞即拥有卵细胞又拥有表皮细胞的染色体，所以还不能用于医疗用途。
Dr Noggle and Dr Egli were then able to create pluripotent stem cells from their tiny embryo-but these had chromosomes both from the egg and the skin cell, making them useless for therapy.
之后，DrNoggle和DrEgli就能从这个小胚胎细胞得到多能干细胞-但这一细胞即拥有卵细胞又拥有表皮细胞的染色体，所以还不能用于医疗用途。
Dr Noggle and Dr Egli were then able to create pluripotent stem cells from their tiny embryo-but these had chromosomes both from the egg and the skin cell, making them useless for therapy.
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