The genetic control of mutation in drosophila : spontaneous mutation, mutator genes, mitotic recombination
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Mitotic recombination (MR) chromosomes are geographically widespread and occur in high frequency in wild Drosophila melanogaster populations. In both sexes, MR chromosomes increase the frequency of mitotic recombination and act as mutators for specific gene loci. Thus, MR chromosomes strongly influence the spontaneous mutation process.