title: Balanced chromosomal polymorphism in experimental populations of Drosophila ananassae Doleschall.
mesh_terms: D000222:Adaptation, Physiological; D000818:Animals; D002875:Chromosomes; D004330:Drosophila; D005796:Genes; D005838:Genotype; D006579:Heterozygote; D007814:Larva; D011110:Polymorphism, Genetic