Delineation of Robertsonian translocations in man by means of chromosome banding.

Robertsonian translocations from thirteen unrelated individuals were studied by G, Q and C banding, and by autoradiography. Each of three D-D translocations involved chromosomes 13 and 14, all four D-G translocations involved chromosomes 14 and 21, and five of six G-G translocations involved two chromsomes 21 while the sixth involved 21 and 22. Two centromeres were noted in a single 21-21 translocation chromosome by C banding. Autoradiogrpahy was much less useful in identifying the chromosomes involved in the thirteen translocations. G and Q banding were consistently accurate.