title: [Transmission of a small supernumerary chromosome in a family with two cases of 21 trisomy].
mesh_terms: D000782:Aneuploidy; D002648:Child; D002869:Chromosome Aberrations; D003878:Dermatoglyphics; D004314:Down Syndrome / Q000235:genetics*; D005260:Female; D006801:Humans; D007621:Karyotyping; D010375:Pedigree
vernacular_title: Transmission d'un petit chromosome surnuméraire dans une famille avec deux cas de trisomie 21.