title: Normal chiasma formation in a male with xeroderma pigmentosum.
mesh_terms: D000328:Adult; D001706:Biopsy; D002455:Cell Division / Q000528:radiation effects; D002875:Chromosomes; D003434:Crossing Over, Genetic; D004260:DNA Repair / Q000528:radiation effects; D005347:Fibroblasts / Q000528:radiation effects / Q000648:ultrastructure; D006801:Humans; D007621:Karyotyping; D008214:Lymphocytes / Q000528:radiation effects / Q000648:ultrastructure; D008297:Male; D008540:Meiosis / Q000528:radiation effects; D008854:Microscopy, Electron; D008938:Mitosis / Q000528:radiation effects; D011831:Radiation Genetics; D012867:Skin / Q000473:pathology; D013094:Spermatozoa / Q000648:ultrastructure; D013737:Testis / Q000473:pathology; D013936:Thymidine / Q000378:metabolism; D014316:Tritium; D014466:Ultraviolet Rays; D014983:Xeroderma Pigmentosum / Q000235:genetics*
chemical_list: D014316:Tritium; D013936:Thymidine