“…In at least two studies, families with chromosomally abnormal individuals have been shown to have an increased incidence of satellite association Zellweger et al, 1966). The incidence of satellite associations (F roland and M ikkelsen, 1964;Cohen and Shaw, 1967), types and frequency distributions of G and D chromosomes in associations (van B rink et al, 1962;Cohen and Shaw, 1967) variations among individuals (Engmann, 1967;Ford and W oollam, 1967) have now been studied.…”