An interchange which raises chiasma frequency.
D000818:Animals; D002875:Chromosomes; D003434:Crossing Over, Genetic; D006570:Heterochromatin; D007313:Insecta / Q000166:cytology; D008297:Male; D008540:Meiosis; D008853:Microscopy; D011995:Recombination, Genetic
D006570:Heterochromatin