Figure 4
From: Two genomic regions together cause dark abdominal pigmentation in Drosophila tenebrosa
y gene expression foreshadows the black pigment on adult abdomens. (a) D. tenebrosa adult, showing the uniformly black tergites on the abdomen. (b) D. tenebrosa, abdominal epidermis at pupal stage P10. The in situ hybridization, using a species-specific probe, shows that the y gene expression pattern correlates with the future black melanin pattern. (c) D. suboccidentalis adult, showing that tergites of the adult abdomen are yellow, each adorned with a black stripe along the posterior edge. (d) D. suboccidentalis, abdominal epidermis at pupal stage P10. In situ hybridization with a species-specific probe reveals that the y gene expression pattern foreshadows the black stripes in the adult cuticle.
