Fig. 5. Genetic mosaics in which an unc-52(+)-bearing extrachromosomal array was lost somatically in animals that were otherwise homozygous for unc-52(e669). The early C. elegans cell lineage and the cell types generated by each founder cell are indicated. Points in the lineage at which array losses were identified are shown. One mosaic animal lost the array at both AB and EMS. All other mosaic animals had single array losses in this part of the lineage. White and black circles represent non-Unc-52 and Unc-52 animals, respectively; thus, one P1(-) mosaic was Unc-52 and six were wild type.