Do all cell have the same genetic information?

Yes, nearly all cells in an organism contain the same genetic information, as they originate from a single fertilized egg. However, while the genetic code is identical, different types of cells express different genes, leading to diverse functions and characteristics. This variation is primarily due to regulatory mechanisms that control gene expression, allowing cells to specialize. Exceptions include gametes (sperm and egg cells) and certain immune cells that undergo specific genetic changes.