title: Origin of teratomas and twins.
abstract: Probabilities are given for three modes of origins of teratomas and for five possible modes of origins of twins. Besides testing for monoluteal dispermic twins, these probabilities enable centromere mapping. Trisomy and triploidy arising through nondisjunction give the same information.
mesh_terms: D000818:Animals; D002503:Centromere / Q000648:ultrastructure; D005260:Female; D005306:Fertilization; D006801:Humans; D008297:Male; D008540:Meiosis; D008954:Models, Biological; D009630:Nondisjunction, Genetic; D011123:Polyploidy; D011247:Pregnancy; D013724:Teratoma / Q000196:embryology* / Q000235:genetics; D014314:Trisomy; D014427:Twins; D014429:Twins, Dizygotic