Disruptive selection.
D000818:Animals; D005075:Biological Evolution; D004331:Drosophila melanogaster; D004777:Environment; D005260:Female; D005799:Genes, Dominant; D005828:Genetics, Population; D006824:Hybridization, Genetic; D008297:Male; D010641:Phenotype; D011110:Polymorphism, Genetic; D012641:Selection, Genetic