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Interaction of non-allelic loci in expression of the extra-sexcomb phenotype inDrosophila melanogaster

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Summary

The expression of the extra-sexcomb phenotype is enhanced in males that are doubly heterozygous for mutants from two non-allelic loci,‘extra-sexcomb’ (Polycomb, Extra-sexcomb) and‘bithorax’ (bithorax, bithoraxoid, Ultrabithorax) as compared to the expression of the ‘extra-sexcomb’ mutants when no ‘bithorax’ mutants are present in the genotype. If the ‘bithorax’ mutants are recessive, the expression is usually greater when the non-allelic mutants are cis-hererozygotes than when they are trans-heterozygotes, but there is no difference between cis-and trans-heterozygotes in ‘extra-sexcomb’ andUltrabithorax compounds.

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This work, begun while the author was a member of the staff of the Zoology Dept. of the University of California at Berkeley, was completed, with the assistance of a National Institutes of Health research grant (RG-6754), in the Dept. of Genetics of the University of Turku.

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Hannah-Alava, A. Interaction of non-allelic loci in expression of the extra-sexcomb phenotype inDrosophila melanogaster . Zeitschrift für Vererbungslehre 95, 1–9 (1964). https://doi.org/10.1007/BF00898179

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