If liver cells and eye cells have the same transcription factor, why isn't the liver gene expressed in your eye cells?

Expression of each gene requires a unique combination of multiple transcription factors. Expressing a gene all the time, regardless of conditions, Pax-6 is highly conserved and shows shared evolutionary ancestry. cytoplasmic determinants that are distributed unevenly in the unfertilized egg inductive signals from one cell to another. Gradients of molecules in developing tissues. the products of regulatory genes.