title: Progressive resistance against the male recombination factor 31.1 MRF acquired by Drosophila melanogaster.
abstract: A genetically abnormal but structurally normal second chromosome (31.1 MRF) which induces recombination in the male sex, was introduced by outcrossing into the cytoplasm of a normal strain. In this new combination, male recombination frequency induced by females dropped from 3.81% to 0.17% within 10 generations, indicating a gradual acquisition of resistance against the activities of the 31.1 MRF.
mesh_terms: D000818:Animals; D003433:Crosses, Genetic; D004331:Drosophila melanogaster / Q000235:genetics*; D008297:Male; D008540:Meiosis; D011995:Recombination, Genetic; D012737:Sex Factors