Fig. 1From: A two-level model for the role of complex and young genes in the formation of organism complexity and new insights into the relationship between evolution and developmentSchematic diagram of the factors contributing to genome/organism complexity. In theory, organism complexity correlates well with genome complexity. The factors contributing to genome complexity are classified into two classes: gene number and intrinsic gene properties which include the complexity and age degree of genes or the gene products. CRM cis-regulatory motifs/modules, TRM trans-regulatory moleculesBack to article page