Fig. 1. Cre expression results in efficient recombination of floxed alleles. (A) Embryos from Foxg1-cre mice paired with Rosa26 reporter mice were taken at E13.5, whole mounted and stained with X-gal to visualize cre expression. (B) Robust LacZ staining was exhibited in the telencephalon of Foxg1-cre mice (coronal) (n = 4).