PLEASE HURRY. I'LL GIVE BRAINLIEST. A brand new zygote divides by mitosis and cytokinesis over and over. Before the cells are specialized, they are called stem cells. How do stem cells specialize into a nerve and red blood cell?

1. The nerve and red blood cells will have different DNA and thus make different proteins. 2. They nerve and red blood cells are going to have the same DNA and will use the same genes to make the same exact proteins.
3. The nerve and red blood cells will turn on and off different portions of their DNA, using different genes to make different proteins.
4. The nerve and red blood cells will have the exact same structure and function.