Lifton's group found that 2 percent of the subjects carried one defective copy of one of the three genes.

Lifton小组发现2%的受试者携带三个基因中的一个缺陷基因。

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The researchers speculated that people who carry only one defective copy might be less prone to hypertension.

研究人员推测只携带一个缺陷基因的人可能更容易发生高血压。

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Women carrying a defective copy of the BRCA1 gene have upto an 80 percent lifetime risk of developing the disease, doctors have found.

年夜夫发现，携带出缺陷的BRCA1基因的妇女中，多达80%的人会得乳腺癌。

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Some 600, 000 Americans have a less severe version caused by one defective copy. (There would be more of the double-gene victims if they didn't die young.) To get its drug approved Isis will need to study 45 patients with the severe two-gene form and a few hundred with the single-gene disease.

FORBES: Degunker

Most American Jews are Ashkenazim those who trace their ancestry to Eastern and Central Europe and three of the more than 100 different BRCA mutations discovered to date two in BRCA1, the other in BRCA2 are so common among Ashkenazim that more than 2% of them harbour a defective copy of one of the genes.

ECONOMIST: A test of uncertainty

If it is safe, the medicine could also be used for patients who have a single copy of the defective gene.

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