title: Sex chromosome activation during spermatogenesis.
mesh_terms: D000818:Animals; D005075:Biological Evolution; D004330:Drosophila; D004794:Enzyme Repression; D005796:Genes; D006570:Heterochromatin / Q000502:physiology; D007248:Infertility, Male / Q000235:genetics; D008297:Male; D009154:Mutation; D012730:Sex Chromosomes / Q000502:physiology / Q000648:ultrastructure; D013091:Spermatogenesis; D013094:Spermatozoa / Q000648:ultrastructure; D014158:Transcription, Genetic
chemical_list: D006570:Heterochromatin