[Recent developments of instrument assisted chromosome analysis with Quantimet 720 (author's transl)].

The system looks in a short time automatically for good metaphase spreadings. Two routines are described which evaluate the relocated metaphases in a semi-automatic way. One routine classifies human chromosomes, using the chromosome area and area ratio of the chromosome arms. The other routine classifies the chromosomes of the chinese hamster. In this routine statistical inputs for chromosome aberrations are possible.