1. An operator assisted system using a programmed computer for producing karyotype images from a slide mounted on the stage of a microscope, said slide having a plurality of dispersed metaphase chromosome spreads, comprising moving said stage under instructions of said programmed computer connected to control said microscope to successively present said plurality of dispersed metaphase chromosome spreads to the optics of said microscope, storing the location of each spread, thereby automatically prescanning said slide for chromosome spreads, moving said stage under instructions of said programmed computer to place the slide motionless on said stage at each successive chromosome spread location, thereby enabling an operating to view each successive chromosome spread to inspect the chromosome spread and determine whether it is acceptable for the purpose of analysis or not, deleting under operator control the location of each spread determined not to be acceptable thereby establishing a list by location of which the chromosome spreads are acceptable, again moving said stage under instructions of said programmed computer for generating a digital picture of each of said acceptable chromosome spreads, arranging the chromosomes in the digital picture of an acceptable chromosome spread in a karyotype format, and producing a visible image of the karyotype format for each acceptable chromosome spread.