31.   The cancer could still be deadly, but patients with the mutated gene lived more than twice as long as similar women who did not have it.

32.   The disease occurs only if a child inherits a copy of the mutated gene from each parent.

33.   The embryos with the mutated gene produced defective BMP receptors, which were deaf to the suicide signal.

34.   The mutated gene can be passed from parent to child.

35.   The researchers linked the mutated gene to a piece of DNA that forces cells in the brain to make large quantities of it.

36.   These cancers increase the likelihood that a mutated gene runs in the family.

37.   These mutated genes are put into bacteria to make the mutated proteins, which are then tested to see how well they perform a given task.

38.   They inserted the mutated gene into a retrovirus, which smuggled the altered gene into the cells of chick embryos.

39.   They inserted the mutated gene into a retrovirus, which smuggled the al- tered gene into the cells of chick embryos.

40.   This is happening before experts in the genetics of cancer feel confident they fully understand the significance of inheriting or developing a mutated gene.