21.   Most people, he says, have a specific dominant gene that makes them right-handed.

22.   Nature provides no guarantee that specific genes in any species will be transmitted from parent to offspring.

23.   No one studying a genetically complex disease had then been able to take the next step of identifying the specific gene indicated by the linkage.

24.   Now, scientists are seeking to discover how specific genes play a role in disease.

25.   One is antisense technology, which uses segments of the genetic code as drugs to turn off specific genes.

26.   Other conditions, including bed-wetting, depression, hyperactivity and obesity, are being linked to specific genes.

27.   Qualset said genetic engineering allows plant breeders to splice a specific gene into the target plant with greater precision than hit-or-miss pollen transfer.

28.   So far, Narayanan has identified one gene specific to colon cancer and another tied to only colon, prostate and pancreatic cancers.

29.   Supporters of biotechnology argue that introducing a specific gene or trait into a plant or animal is merely a refinement of traditional breeding techniques.

30.   Subsequently, Zamecnik developed a technology called antisense DNA, in which researchers synthesize short chains of genetic material to inactivate the expression of specific genes.