Genes are not all. And especially in mice.

Selected papers

Mehtali, M., LeMeur, M. and Lathe, R. (1990) The methylation-free status of a housekeeping transgene is lost at high copy-number. Gene 91, 179- 184

Dobie, K.W., Mehtali, M., McClenaghan, M. and Lathe, R. (1997) Variegated gene expression in mice. Trends Genet. 13, 127–130

Lathe, R. (2004) The individuality of mice. Genes Brain Behavior 3, 317–327