最终这些技术也许会允许科学家们在实验室的培养皿中修正细胞遗传上的缺陷，并用矫正后的细胞来治疗病人。

Eventually, such techniques might allow scientists to correct genetic defects in the lab dish and then treat patients with their own repaired cells.

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但有证据表明，年龄较大的爸爸更可能传递遗传缺陷给它们的后代。

But there is evidence that older dads are also more likely to pass on genetic defects to their offspring, according to Copel.

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锥体细胞的遗传缺陷导致了色盲，这是人类最常见的一种基因疾病。

Genetic damage to cone cells, which causes colour blindness, is the most common type of gene disorder seen in humans.

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