Table 1. Percentage of aberrant repair events with flanking deletions.

Genotype	Lethal	Nonlethal	Total	n
Wild type	2.4	7.0	9.4	85
mus309	25.0	36.5	61.5	104
spn-A	2.6	1.7	4.3	116
mus309 spn-A	6.7	1.9	8.6	105*

^*There were an additional four male-lethal chromosomes that did not produce a scalloped-wing phenotype in trans to sd¹, indicating that these events did not involve deletions into sd. Similar events have been observed in other genotypes (M.M., unpublished data) and may result from transposition of the P{w^a} into a nearby essential gene