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Ventral views of cochleae from heterozygous and hOtx12/hOtx12 mutant mice. Each of the mutant cochleae demonstrates abnormalities in both number of coils and shape (arrows). In addition, some coils have aberrant protrusions (arrowheads). En, embryonic day n. Orientation: A, anterior; L, lateral. (Scale bar = 200 μm.)
