[The G and C banding chromosome patterns of the transplantable mammary adenocarcinoma in mice].

Cells of mice MA-737 mammary adenocarcinoma from 5 different generations were analysed by G and C banding techniques. Altogether, 540 metaphase plates were studied. All chromosomes showed telocentric and C bands. The modal chromosome numbers were 41, 82, 86, 89 and 91. The karyotype of cells with 41 modal number was 41, XO, +7 +M. In most of the cells, one or two marker chromosomes were present. This marker is characteristic of all MA-737 cells. The relationship between chromosome aberration and malignant transformation is briefly discussed.