A couple of weeks ago, we posted our annual dev bio image contest photos. More than 180 people voted and the majority chose “E” (see photo to the right). Karla Verlade, sophomore developmental biology student, snapped this photo with a smart phone when we were learning about in situ hybridization and image capture. The zebrafish embryo in “E” was subjected to in situ hybridization with a sox2 mRNA antisense probe. At 3 days post fertilization, the cells expressing this gene include stem cells in the eye and brain as well as distinct populations of neurons. In this dorsal view, the pointer indicates lightly stained neural stem cells at the periphery of the retina.
Well done, Karla! And thank you to everyone who voted!