1.   At least one and usually two or more wild-type or heterozygous littermates were analysed in parallel with the mutant mice.

2.   Using virus vectors, Woo successfully inserted normal mouse genes for phenylalanine hydroxylase into cultured liver cells from the mutant mouse.

3.   Biotech companies such as Charles River Laboratories and Taconic entered the market, offering quicker turnaround for limited numbers of popular mutant mice.

4.   Both the MIT and Columbia groups found that their mutant mice were severely impaired in their ability to form memories of new environments.

5.   A mutant mouse can do it, and scientists announce they have cloned the responsible gene.

6.   Allowed all the alcohol they wanted, mutant mice drank twice as much as normal mice.

7.   But by the next day, the mutant mice had largely thrown caution to the winds and were ready to chance the dark again.

8.   Despite the striking results from their study on these mutant mice, McKnight heartily agreed.

9.   Despite the lack of fosB, the first generation of mutant mice seemed perfectly normal.

10.   For centuries, people have bred mutant mice.