“…Familial translocations have been reported by Soudek, Laxova, and Addmek (1968) and Cohen and Davidson (1967). A few reports of non-familial G/G tandem translocations have also appeared (Warkany and Soukup, 1963;Zellweger, Mikamo, and Abbo, 1963;Lejeune et al, 1965). Sachdeva, Wodnicki, and Smith (1971) and Vogel (1972) found a G/G tandem translocation chromosome with satellites on both the long and short arms, and identified it as a 21/21 translocation by differential staining.…”