Epistasis - Genetic Interaction

"Let the land produce vegetation: seed-bearing plants and trees on the land that bear fruit with seed in it, according to their various kinds". And it was so. (Genesis 1-11)

Genesis City contains in any particle of colision all the DNA necessary to grow up different systems that evolve through time with significant differences. In a process of epistasis, where the effects of a gene are modified by other several genes, the city suffers mutation according to this interaction.