细胞学调查结果显示，该有芒株为添加额外染色体的变异株。

Cytological investigation showed that this awned plant was a variation with extra chromosomes.

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患唐氏综合征的老鼠在其基因组添加入了一条完整的人类染色体，以帮助研究人员对该疾病有更多的了解。

Down's syndrome mice have had a whole human chromosome added to their genome to help researchers learn more about the illness.

youdao

患唐氏综合征的老鼠在其基因组添加入了一条完整的人类染色体，以帮助研究人员对该疾病有更多的了解。

Down's syndrome mice have had a whole human chromosome added to their genome to help researchers learn more about the illness.

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