Figure 2From: Fluorescent sperm in a transparent worm: validation of a GFP marker to study sexual selectionIn vivo micrographs of the antrum of a worm mated with a GFP(+) and a GFP(-) partner. A, total number of received sperm under bright field illumination (14 sperm cells). B, the single fluorescent sperm coming from the GFP(+) sperm donor, under epifluorescence illumination. Scale bar represents 20 μm.Back to article page