11.   The three genes work as a tightly knit team, together with other tightly knit teams that have yet to be discovered.

12.   There was no way to control where the virus would add the new genes, and no way to make sure that the new genes would work.

13.   They still had trouble getting the genes to work together after shooting them one at a time into rice embryos.

14.   Through careful management of such crops, many experts think the pesticidal genes will work indefinitely.

15.   What if the new genes worked too well, and could not be turned off?

16.   Changes in gravity could also affect how genes work and could even affect evolution, Morey-Holton said.

17.   Desrosiers said he doubts the suicide gene will work.

18.   Finding the balance will be as critical as figuring out how our genes work.

19.   If the checkpoint genes work, then genetic errors are stopped immediately.

20.   In the obese rats, the Beacon gene was working in overdrive, forming too much appetite-stimulating protein.