21.   In such women, a mutated gene creates an extremely high risk of early-onset breast cancer, and they might want the test.

22.   In these diseases, people with a single copy of the mutated gene are healthy.

23.   It is already possible for women to be tested to determine whether they are susceptible to cancer because they carry a mutated BRCA gene.

24.   Parker hypothesizes that it is when the burden imposed by mutated genes rises above a certain threshold that diseases occur.

25.   Rozen said she tested herself to see if she had the mutated gene.

26.   Schulman gave no credence to the hypothesis that the mutated gene might pose little risk in women without a family history of breast cancer.

27.   Schulman gives no credence to the hypothesis that the mutated gene might pose little risk in women without a family history of breast cancer.

28.   She had the mutated gene.

29.   Some are enthusiastically looking for subtle advantages conferred by these mutated genes.

30.   Texans have a mutated gene of rustic rube that long ago was bred out of most Americans.