title: Human chromosomal heteromorphisms: nature and clinical significance.
mesh_terms: D002503:Centromere / Q000648:ultrastructure; D002869:Chromosome Aberrations; D007446:Chromosome Inversion; D002877:Chromosomes, Human / Q000648:ultrastructure*; D005260:Female; D006570:Heterochromatin; D006801:Humans; D008297:Male; D011110:Polymorphism, Genetic; D011247:Pregnancy; D013194:Staining and Labeling; D009626:Terminology as Topic; D014427:Twins; D014998:Y Chromosome / Q000648:ultrastructure
chemical_list: D006570:Heterochromatin