11.   His theory about the right-handed gene and the absence of this gene in lefties, he said, grew out of studies of mutant mice.

12.   Japanese scientists have created a strain of mutant mice that develop a long list of aging-related medical problems within weeks of being born.

13.   On a wider scale, Taconic Farms will act as a sort of storage center for such mutant mice, freezing embryos for distribution to scientists across the country.

14.   Tecott and his colleagues pinpointed the effects of the brain chemical by creating mutant mice that lacked the protein and ate more than normal mice.

15.   The mutant mice actually ate more than the normal mice, he said, but had much less stored body fat.

16.   The mutant mouse had a basic daily rhythm about an hour longer than normal mice, caused by a single defective gene, which Takahashi named the Clock gene.

17.   The mutant mice learned to navigate mazes normally.

18.   The scientists tested its effect in obese mice, in normal mice and in a type of mutant mice that develops diabetes.

19.   These mutant mice were aggressive, Hen said.

20.   The mutant mice drank about half as much alcohol as normal mice when given free access.