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。
2
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。
3
15 years after a genedefect was found to increase the risk of schizophrenia 30-fold, scientists have figured out how it might cause the brain disorder's debilitating symptoms