An electropherogram (or electrophorogram) is a record or chart produced when electrophoresis is used in an analytical technique, primarily in the fields of molecular biology or biochemistry. An electropherogram (or electrophorogram) is a record or chart produced when electrophoresis is used in an analytical technique, primarily in the fields of molecular biology or biochemistry. In the field of genetics, an electropherogram is a plot of DNA fragment sizes, typically used for genotyping such as DNA sequencing. Such plots are often achieved using an instrument such as an automated DNA sequencer. Such electropherograms may be used to determine DNA sequence genotypes, or genotypes that are based on the length of specific DNA fragments. These genotypes can be used for: