Figure 5From: Sexual differentiation of the zebra finch song system: potential roles for sex chromosome genesDarkfield images from in situ hybridization depicting sexually dimorphic mRNA expression for CK313884(17-beta-hydroxysteroid dehydrogenase type IV) in HVC at day 25 post-hatching. Arrows delineate borders of song region. Males (A) showed higher levels of mRNA expression than did females (B). Scale bar = 100 μm.Back to article page