Specially imprinted or otherwise custom-made glasses were sometimes used. In both organisms, "Igf2" is imprinted, with expression resulting favourably from the paternally inherited allele. Various methods have been used to identify imprinted genes. The information can also be imprinted on a collar tag worn by the animal. Polyethylene cannot be imprinted or bonded with adhesives without pretreatment. Genes however, can also be partially imprinted. This circuit is imprinted by human symbol systems. It is optically imprinted as a latent image during manufacturing. The name and, if opted, a photo of the holder are imprinted on the cards. Uniparental inheritance of imprinted genes can also result in phenotypical anomalies. Unfortunately, the relationship between the phenotype and genotype of imprinted genes is solely conceptual. It is this interference pattern that is imprinted on the recording medium. The die is repeatedly imprinted to the substrate with certain step size. This slogan was imprinted on local U.S. military license plates. This can ultimately increase diversity in genetic classes, expanding flexibility of imprinted genes.