核型分析结果显示，ZP - 1细胞为正常女性染色体结构。
Karyotype analysis showed that ZP-1 cells have a normal female chromosome structure.
在这八周了，这些染色体是男性胚胎和女性胚胎的唯一区别。
For a few weeks, these chromosomes are all that differentiates male embryos from female embryos.
科学家认为，女性更健康的原因可能在于微rna(核糖核酸)，它是染色体上RNA编码的短片段。
The reason why women are more robust appears to be microRNAs - short strands of RNA encoded on the chromosome, scientists believe.
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