Rotation of photoreceptor clusters in the developing Drosophila eye requires the nemo gene.

@article{Choi1994RotationOP,
  title={Rotation of photoreceptor clusters in the developing Drosophila eye requires the nemo gene.},
  author={Kun Wook Choi and Seymour Benzer},
  journal={Cell},
  year={1994},
  volume={78 1},
  pages={125-36}
}
The Drosophila eye consists of a reiterative hexagonal array of photoreceptor cell clusters, the ommatidia. During normal morphogenesis, the clusters in the dorsal or ventral halves of the disc rotate 90 degrees in opposite directions, forming mirror images across a dorsoventral equator. In the mutant nemo (nmo), there is an initial turning of approximately 45 degrees, but further rotation is blocked. Genetic mosaic analysis indicates that the nmo gene acts upon each cluster as a whole; normal… CONTINUE READING

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