If DNA is identical in all cells of a living organism, what makes some cells become specialized?

Question

I understand that my DNA is what defines me, what makes me me.
However, why do some cells become skin cells, others become hair cells, others gut?

In: Biology

Answer 1

Cell differentiation is also coded for in genes. As an embryo grows the stem cells divide next to other cells who send chemical messages that say “you’re in the heart, so you better become a heart cell or we’llboot you out”.