Having the wrong number of chromosomes can cause an embryo to miscarry, or lead to serious medical conditions such as Down's syndrome.

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。

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"We found that, with age, having cells which inherited the wrong composition of chromosomes resulted in a larger number of spontaneous tumors, " said Cleveland.

Cleveland教授说“我们发现随着年龄的增长，这些错误遗传组成的染色体导致大量自发性肿瘤的产生”。

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