Abstract
The genetics of two esterase systems in adults of the olive fruit flyDacus oleae(Gmel.) have been studied by starch gel electrophoresis. Two unlinked autosomal genes, each with multiple alleles, control the synthesis of a number of isozymes. GeneAcontrols the synthesis of an acetylcholinesterase, and geneBthat of a pseudocholinesterase or lipase. GeneBproduces hybrid enzyme in heterozygotes for active alleles. In crosses the segregation of seven active and one silent allele in geneA, and of six active and one silent allele in geneB, have been studied. Six more active alleles for geneAand five active alleles of geneBhave not been studied in this paper.
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