This predicted 3&colon;1 phenotypic ratio assumes Mendelian inheritance. The Punnett square is a visual representation of Mendelian inheritance. Genomic imprinting is an inheritance process independent of the classical Mendelian inheritance. Population genetics began as a reconciliation of Mendelian inheritance and biostatistics models. Dominance is a key concept in Mendelian inheritance and classical genetics. The false contradiction between Darwin's theory, genetic mutations, and Mendelian inheritance was thus reconciled. Both Belyayev brothers were Darwinists and believers in Mendelian genetics. These patterns of Mendelian inheritance demonstrated the usefulness of applying statistics to inheritance. Before the discovery of Mendelian genetics, one common hypothesis was blending inheritance. Kabuki syndrome is one of the Mendelian disorders of epigenetic machinery. Research regarding Mendelian genetics was prohibited by Joseph Stalin under the Soviet regime. The Mendelian and biometrician models were eventually reconciled with the development of population genetics. These effects can be due to Mendelian or non-Mendelian inheritance. It was thought that the rediscovery of Mendelian inheritance invalidated Darwin's views. Epigenetic changes can lead to paramutations, which do not follow the Mendelian heritage rules.