Final answer:
Gene regulation is essential for cell specialization and function, exemplified by the transformation of a mouse stomach cell into a skin cell through gene activation.
Explanation:
Cells in multicellular organisms are specialized and gene expression plays a crucial role in determining their functions and characteristics. The process of differentiation involves turning on/off genes to move from an unspecialized state to a specialized state, leading to the development of specific cell types such as skin cells. By activating specific genes responsible for skin cell production, scientists were able to transform a stomach cell into a skin cell in a mouse, showcasing the importance of gene regulation in cellular identity and function.
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