title: Spermatogenesis in an infertile XYY man.
abstract: Testicular histology and meiosis has been studied in an XYY male patient identified at an infertility clinic. This man was found to have an XYY set chromosome complement in 15% of spermatogonial metaphases. There was no evidence of 2 Y chromosomes at diakinesis but there appeared to be a slight excess of sperm with a fluorescent Y body.
mesh_terms: D000328:Adult; D006801:Humans; D007248:Infertility, Male / Q000235:genetics* / Q000473:pathology; D008297:Male; D008540:Meiosis; D012671:Seminiferous Tubules / Q000473:pathology; D012729:Sex Chromosome Aberrations; D012730:Sex Chromosomes; D013091:Spermatogenesis; D013093:Spermatogonia / Q000166:cytology