Question

Even though all cells located all along the limb have the same DNA different cellular structures are observed for example the skin that covers the finger like digits in the bones of the finger like digits what causes the certain cells to form different structures of the limb?

Answer 1

Answer: Every cell contains all of the same DNA, however, certain sections of the DNA are "turned off" making the DNA that is "turned on" specific to the structure.

Step-by-step explanation:

The human Genome can wrap around the world 2.5 million times. If we did not have sections of our DNA that were turned off, we would duplicate our entire body during cell division instead of just making one cell. When cell division takes place, such as making a new skin cell, only the nucleic acids that are needed for making a new skin cell will be transcribed, exons will be cut out and "glued" together leaving only the necessary nucleotides to be translated into a new skin cell.