Abstract
ISOALLELES, that is, alleles with minor differences in activity which are indistinguishable except by means of special tests, are of considerable importance in evolution. For example, the evolution of dominance for the wild-type characters must have been a selection process among isoalleles with different activity, favouring the most active one. Hochman1,2 has been able to perform competition experiments with wild-type isoalleles at the ci locus in chromosome IV of Drosophila melanogaster, using their different degree of dominance for discrimination. His results support the view that alleles with complete dominance have a higher adaptive value and supersede the hypomorphic ones.
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References
Hochman, B., Genetics, 43, 101 (1958).
Hochman, B., Evolution, 15, 239 (1960).
Rasmuson, B., Drosophila Information Service, 31, 156 (1957).
Rasmuson, B., Hereditas (in the press).
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RASMUSON, M., RASMUSON, B. Competition Experiments with Isoalleles. Nature 194, 997–998 (1962). https://doi.org/10.1038/194997a0
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DOI: https://doi.org/10.1038/194997a0
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