51.   The chimeric chickens were then bred to produce animals that carried the gene in all their cells, Parkinson said.

52.   The citrosa geranium was developed in the Netherlands and purportedly carries a gene that produces the citronella oil scent, which keeps mosquitoes at bay.

53.   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.

54.   The corn carries a gene derived from a bacterium, Bacillus thuringiensis, that produces Bt toxin, which kills pests that eat the plant.

55.   The Dunigans carry genes for both types of diabetes.

56.   The findings apply to women who carry genes that interfere with their ability to break down certain chemicals in cigarette smoke that are known to cause cancer.

57.   The first couple they assisted wanted a daughter because the woman carried a gene for a rare disease, X-linked hydrocephalus, that strikes boys almost exclusively.

58.   The plants carry foreign genes taken from the viruses that confer protection against the disease.

59.   The researchers, who tested hundreds of Ashkenazi blood samples originally given for other genetic tests, said they found no cases of a woman carrying both genes.

60.   The study being reported was done on white women, more than half of whom carry these genes.