[Behavior of nucleoli during mitosis in chick and quail embryo myoblasts cultured in vitro].

Mitoses of heart-myoblasts of Chicken and Quail embryos were studied in primary hanging-drop cultures. Some differences of nucleolar behavior were observed: Quail nucleoli, unlike Chicken nucleoli, disappear early in prophase. In telophase nucleoli reappear early and more quickly in Chicken than in Quail. Differences between the cells of Chicken and Quail were noted also with the Ag-NOR staining method, particularly during telophase.