DIFFERENTIAL REGULATION OF DUPLICATE ALCOHOL-DEHYDROGENASE GENES IN DROSOPHILA-MOJAVENSIS

Abstract

These studies report the existence of multiple forms of alcohol dehydrogenase in extracts of Drosophila mojavensis. The existence of these forms can be best explained by the hypothesis of a duplication for the Adh locus in D. mojavensis. Electrophoretic variants at each locus have been identified and crosses between individuals carrying alternative alleles at each locus result in F1 progeny with six bands of ADH. This pattern is consistent with these individuals being heterozygous at two loci. The loci have been named Adh-1 and Adh-2. Examination of the isozyme content during development shows that the two Adh genes are not coordinately controlled but have separate developmental programs. In..