31.   Researchers know that cancer is caused by genes turned bad, and they have been trying to develop drugs that fix these flaws.

32.   Scientists want to find out just how a defective gene causes the disease, so they could get clues about how to block or ease symptoms.

33.   Scientists want to find out just how that gene causes the disease, so they could get clues about how to block or ease symptoms.

34.   The MIS gene then causes the nascent female organs in the embryo to disappear.

35.   They said it will take more study to figure out how the gene causes the disease.

36.   While probably no single gene causes obesity by itself, those who inherit several of them are more likely to have weight problems.

37.   Canadian scientists have found the first gene to cause causes a common form of epilepsy, the journal Nature Genetics reported on Sunday.

38.   Malfunctioning genes can cause an embryo to become malformed, prompting the body to expel it in a miscarriage.