title: [A case of duplicate 2lp maternal chromosomes in a case of trisomy 21].
mesh_terms: D002904:Chromosomes, Human, 21-22 and Y; D004314:Down Syndrome / Q000235:genetics*; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007621:Karyotyping; D008297:Male; D010375:Pedigree; D014314:Trisomy
vernacular_title: 21 p + maternel en double exemplaire chez un trisomique 21