Final answer:
Artificial expression of MyoD in fibroblasts can initiate a cellular differentiation process, leading to these cells behaving like muscle cell precursors and potentially transitioning into muscle-like cells.
Step-by-step explanation:
When MyoD is artificially expressed in fibroblasts from skin connective tissue, these cells, which are part of the connective tissue cells, have the potential to become a different cell type. Fibroblasts are the most common cells of connective tissue, responsible for producing the extracellular matrix and collagen. However, the expression of MyoD in these cells may initiate a program of cellular differentiation that resembles the one that forms muscle tissue. This means that the fibroblasts will start to behave like myoblasts, the precursors of muscle cells, which are both derived from the mesodermal layer during embryonic development. As myoblasts fuse to form multinucleate muscle fibers, these modified fibroblasts may begin the process of transformation into muscle-like cells.