if all cells have the same DNA how they perform different tasks?

Question

if all cells have the same DNA how they perform different tasks?

In: Biology

Answer 1

The cells have the same DNA but they don’t all use the same sequences. Depending on how they originally developed and where they are in the body, they turn off sequences that aren’t needed for their particular function. A skin cell, for example, doesn’t need the same set of instructions as a neuron which likewise doesn’t need the same set of instructions as bone marrow.