Caption
The phenotype of the U1 allele.
Lateral aspect.
Oriented anterior left.
After U: Upturned on page 738 from Lindsley and Zimm (1992).
D. L. Lindsley and G. G. Zimm. The Genome of Drosophila melanogaster. Academic Press,
San Diego, CA, 1992. ISBN 0124509908.
