Key points are not available for this paper at this time.
During the last five years the techniques for detailed analysis of chromosome differences have developed very rapidly. Each chromosome of a species can now be often identified by its specific banding sequence. This leads to an increased precision in the recognition of chromosomal aberrations, mapping of structural rearrangements and detection of polymorphic variations, all of which can be usefully applied in biology and medicine. The technique introduced by Caspersson et al. (1968), i.e., using the intense fluorescence obtained at specific chromosome regions after staining with quinacrine derivatives for the purpose of recognizing the chromosomes, has become an exceedingly useful tool in cytogenetics.
BIRGIT NILSSON (Thu,) studied this question.