H-Y and serendipity.
D000818:Animals; D005260:Female; D005826:Genetics, Medical / Q000266:history*; D006084:Graft Rejection; D006182:H-Y Antigen; D049673:History, 20th Century; D006801:Humans; D008297:Male; D051379:Mice; D012732:Sex Determination Analysis; D014481:United States
D006182:H-Y Antigen