11.   Such a device, ultimately an artificial reproductive tract, may be able to sort and test embryos for genetic flaws.

12.   The cause of the genetic flaw is unknown, but it might be an accidental mutation.

13.   The study was the first of its kind, Minna said, in making a tumor shrink by correcting a specific genetic flaw in the cancer cells themselves.

14.   They want to know, for example, whether a genetic flaw in the young fish caused by the spill was passed on to the next generation.

15.   People with cystic fibrosis carry a genetic flaw that results in thick lung secretions.

16.   Reassuring the overweight that obesity is more than a matter of sloth and gluttony, scientists have pinpointed for the first time a genetic flaw that makes people fat.

17.   But a genetic flaw can knock the whole cycle off kilter.

18.   Does this mean the human race will become dangerously loaded down with genetic flaws?

19.   Earlier research by Weinberg helped pave the way for Herceptin, a government-approved drug that targets the genetic flaws that cause breast cancer.

20.   Finding a small genetic flaw would also help parents who ask about the risk to future children.