The correct interpretation on the zymogram is the key to acquire the genetic data , in allozyme analysis. As aphenotype, the banding pattern in a zymogram is based on the quaternary structure of the enzyme protein(the number of subunits),the distribution in the subcellular compartments of the enzyme (the number ofloci), and the ploidy and the genotype of the sample examined. A term of "Zymotype" is suggested to usefor iterpreting the panding patterns. It will lead to a completely wrong conclusion, if the numbers of thebands or the differences of migration rate of the bands are directly used as a measure of genetic diversity or asa numerical characters to calculate the similarity and to make a cluster analysis for a group of samples.