31.   Such genes have often been for rare inherited diseases, in which a defect in a single gene is at fault.

32.   The confusion follows years of debate about widespread screening to identify individuals who carry the gene for CF, which is the most common lethal inherited disease among Caucasians.

33.   The effort is expected to one day lead to cures for inherited diseases.

34.   The Geron Corporation, which paid for the research, hopes to grow tissue for transplants and introduce genes internally to remedy inherited disease.

35.   The majority of inherited fatal diseases, however, are vastly more complicated.

36.   The question becomes agonizingly personal for people who suspect that they have or carry an inherited disease.

37.   The same argument can be made about crippling inherited autoimmune diseases, such as childhood diabetes and rheumatoid arthritis, Bodmer says.

38.   The technique, he says, could enable us to cure many inherited diseases before birth.

39.   There was a ready sample of cells from people who had been screened to see if they were carriers of genes for other inherited diseases.

40.   This has led to some worry about the possible misuse of research, for example, among Jews taking part in tests about inherited disease.