21.   It may turn out that their PXE gene will work with other genes related to the clogging of arteries, a condition that afflicts millions.

22.   Nor has it been determined if these genes actually work this way in nature.

23.   Researchers believe that many genes work together with environmental factors to cause eating disorders.

24.   The genes work overtime in normal-size rats that are prone to obesity, churning out high levels of peptides after a fatty meal.

25.   The laureates reasoned that the mutated genes in fruit flies work the same way in humans.

26.   Then scientists will have to figure out how the genes work together to produce a male.

27.   If the suppressor gene does not work as it should, tumor growth is not prevented and a tumor can develop.