extra chromosome的意思|示意

Down syndrome (trisomy 21) is a disorder caused by the presence of an extra 21st chromosome.

唐氏综合症（21三体综合症）是由于患者额外多了一条21号染色体所致的疾病。

I'm sensitive, creative and artistic, and perhaps that comes from my extra X chromosome.

我有同情心、有创造力、有艺术气质，或许这正是那条多出的X染色体赋予我的。

Often, the error resulted in an extra copy of chromosome 21, which causes Down's syndrome.

通常情况下，错误导致21号染色体的多余复制，引发唐氏综合症。

I owe my ability to accept maternal failure to my son Adam. Though I bred young, never smoked or drank, ate right, and all that, Adam showed up with an extra chromosome, mentally retarded.

我自己获得接受失败的能力还要归功于我的儿子Adam。虽然我很早就生下了Adam。自己也从不吸烟喝酒，饮食正确。

Scientists have long suspected that such genetic benefits might accrue from having an extra chromosome 21.

科学家更深入地推测，这些基因上的益处也许能在那条额外的21号染色体上获得增加。

Conclusion the extra small chromosome is part of the chromosome Y.

结论：额外小染色体来源于Y染色体。