Some of the babies were related as they showed a congenital bone defect on their knee bones, which is a very rare gene.

一些孩子还是血脉相连的，因为他们的膝盖骨上都有一种先天性的骨质缺损，这种遗传基因是非常罕见的。

youdao

If you look in the normal population and ask what fraction of people have [a defect in methylation in the gene encoding insulin-like growth factor 2] it's about 5 percent.

如果你观察普通人群，调查多少比例的人有[胰岛素类生长因子2基因编码甲基化的缺陷]，大概是百分之5。

youdao

15 years after a gene defect was found to increase the risk of schizophrenia 30-fold, scientists have figured out how it might cause the brain disorder's debilitating symptoms

15年前，基因缺陷被发现可增加30倍的精神分裂风险，现在科学家终于查明基因缺陷是如何引起大脑功能失调症状。

youdao

The researchers produced mice with a defect in the Msx1 gene.

VOA: special.2009.12.22

It's a single gene defect and we know exactly where the genetic defect is in sickle cell.

是一种单基因缺陷,而且我们准确地知道,镰状红细胞贫血的基因缺陷在哪里

耶鲁公开课 - 生物医学工程探索课程节选

Usually this is a disease that's caused by a defect in a single gene.

通常在疾病是由,单基因缺陷引起时才可行

耶鲁公开课 - 生物医学工程探索课程节选

But in 1991 British researchers identified a gene defect that causes rare, early-onset Alzheimer's.

FORBES: Executive Health

The scientists will now begin work to look at exactly how the gene defect affects fibroid growth.

BBC: Gene defects have been linked to fibroids

Despite some similar symptoms such as lack of motor control, SMA is caused by an unrelated gene defect.

FORBES: For Arya