Such analyses in the much smaller genome of yeast have required over 500 microarrays, and we estimate that over 2,000 data sets will be needed for analysis of the mouse genome. In addition ...

Grasp and cut samples at the edges, so the areas of interest aren't damaged. At right is a section of mouse spleen damaged by rough handling. Many of the cells are distorted beyond recognition. There ...

Of two genetically identical mice, how can one be small and another fat? Research on epigenetic changes resulting from the environment can give us clues into obesity in mice--and humans.