Figure 1: Selection and culture of pupae for dissection.
(A) Wandering third larval instar (L3) larvae and pupae locate along the sides of healthy Drosophila cultures. (B) Pre-pupae can be identified by their translucent white color as pigment has yet to be generated in the protective pupal case. Anterior-posterior and dorsal-ventral axis of the pupa are shown in blue. A damp bamboo splint is used to dislodge and pick pre-pupae from the vial walls. (C) Pupae are placed inside 1.5 mL microcentrifuge tubes that are labelled appropriately (genotype, date of collection, and time of collection) and (D) cultured inside a humidified chamber assembled from an empty pipette-tip box. Humidity is maintained by placing a piece of damp tissue inside the box.