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January 21, 2016

Rotation of terminalia (male reproductive organ) in Drosophila pupa

Explanation

During pupal stage of male Drosophila, the male reproductive organ (terminalia) undergo one full clockwise rotation (12 to 14 hours) with respect to the A-P axis, resulting in the wrapping of the spermiduct around the hindgut. In order for the terminalia to make its circuit, the surrounding epithelial cells must also move as a group in the same direction. Researchers at RIKEN CDB have revealed that epithelial L-R asymmetry can give rise to autonomous collective cell movements