Frequency of x-ray-induced crossing-over in structurally different types of chromosome of Drosophila melanogaster females.
D000818:Animals; D002869:Chromosome Aberrations; D002875:Chromosomes; D003434:Crossing Over, Genetic; D004330:Drosophila; D005260:Female; D006570:Heterochromatin; D011831:Radiation Genetics; D011995:Recombination, Genetic
D006570:Heterochromatin