Dessa är ordets definitions relaterade till trisomy-21. Klicka på valfritt ord för att gå till dess ords detaljsida. Eller, gå till definitionen av trisomy-21.
0 the most common form of Down's syndrome (= a genetic condition associated with learning difficulties in which a person is born with an extra chromosome) that is caused by there being an extra copy of the chromosome number 21 in the body's cells: