RNA in situ hybridization on sections through the middle turn of E14.5 Fgf20−/+ (Fgf20Cre/+) and Fgf20−/− (Fgf20Cre/βgal) cochlear ducts. Bracket, prosensory domain. Scale bar, 100 μm.
(A) Genes expressed within the Fgf20Cre lineage: Tectb, Tecta, Smpx, Epyc, Fat3, and Heyl
(B) Genes expressed outside of the Fgf20Cre lineage: Gata2, Meis2, Lmx1a, and Bmp4