title: The supernumerary segment system of Stethophyma. II. Heterochromatin polymorphism and chiasma variation.
mesh_terms: D000818:Animals; D002875:Chromosomes; D003165:Complement System Proteins / Q000032:analysis; D003434:Crossing Over, Genetic; D005060:Europe; D005828:Genetics, Population; D006570:Heterochromatin / Q000032:analysis; D006579:Heterozygote; D007313:Insecta; D008540:Meiosis; D009656:North America; D011110:Polymorphism, Genetic; D012730:Sex Chromosomes / Q000032:analysis; D013030:Spain; D013045:Species Specificity
chemical_list: D006570:Heterochromatin; D003165:Complement System Proteins