11.   Often they are patents on the process used to discover a particular gene sequence.

12.   Several thousand years ago, somewhere in the Middle East, there lived a person who bequeathed a particular gene to many present-day descendants.

13.   Should, for example, workers with particular genes be kept out of jobs that entail exposure to certain chemicals?

14.   That stops a particular gene from producing the protein for which it holds the recipe.

15.   The basic idea of the chips is to convert the chemistry of life into a static form programmed to monitor particular genes.

16.   The Irish are more genetically similar than a comparable group of, say Americans, and that makes it easier to home in on particular genes of interest.

17.   The method can be used both to disrupt particular genes and to add new genetic material at a specific site.

18.   The study traced the evolution of a particular gene that governs the suppression of tumors, and also fetal growth.

19.   The test, for breast cancer, is based on how many copies of a particular gene a patient has.

20.   They can also be used to test which variations of particular genes a person has.