尽管如此，他说如有必要，这些鱼也可以携带上三染色体。
He says, though, that his fish could also be made triploid if necessary.
三位科学家发现了端粒的工作机理，这种(酉每)可以产生DNA的微小部分，包裹染色体的顶端。
The scientists discovered the workings of telomerase, an enzyme that produces tiny units of DNA that seal off the tips of chromosomes.
三名美国科学家因为发现了能在细胞分裂时防止染色体散裂的“保护帽”而赢得今年诺贝尔医学奖。
The discovery of a "protective cap" that prevents chromosomes from falling apart when cells divide has earned three American researchers this year's Nobel prize in medicine.
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