Summary
Four inbred lines, two homozygous AdhS/S and two homozygous AdhF/F, were extracted from a laboratory cage population of Drosophila melanogaster and crossed in all combinations. Directional dominance for low ADH activity was present and confined to AdhF/S heterozygotes. The remaining genetical differences between the four lines for ADH activity were due to additive genetical variation. The frequency of the Adhs allele in the population was 0ยท89. The observed directional dominance for low ADH activity in AdhF/S heterozygotes corresponded to the general direction of selection for ADH activity within the population.
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Birley, A., Barnes, B. Genetical variation for enzyme activity in a population of Drosophila melanogaster. Heredity 35, 121โ126 (1975). https://doi.org/10.1038/hdy.1975.73
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DOI: https://doi.org/10.1038/hdy.1975.73
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