Abstract
1) 132 second chromosome recessive lethals of Drosophila melanogaster selected for the region of 55.1 on the second chromosome by using overlapping deficiencies.
2) Nine lethal genes fell in this region. Three of them were allelic each other and one was assumed to be a small deficiency. The three allelic lethals were extracted from the different original populations.
3) Recombination analysis among these lethals was performed and maximum distance among these lethals was 0.00876 map unit. Distance between two recessive outside markers of this cluster was estimated to be 0.03 map unit based on cis- and trans-phase recombination tests.
