FIGURE 3-24 Gene Expression Identical coronal sections through the brain of mice with identical genotypes reveal frontal views of distinctly different phenotypes. (A) This mouse had a corpus callosum. (B) This mouse did not.

Advances in Behavioral Biology Volume 42, 1994, pp. 125–133; Defects of the Fetal Forebrain in Acallosal Mice; Douglas Wahlsten, Hiroki S. Ozaki, © 1994 Plenum Press, New York, Figure 1, with permission of Springer Science1Business Media