What occurs during cell differentiation?

Answer: Zygote cells turn into adult STEM cells divide and create differentiated daughter cells.

Explanation: All DNA is in all cells, but different cells are specialized to preform different functions. They still contain all of the DNA, but they only use a small portion of the DNA. This occurs during a process called Gene Expression. Gene expression is the specific combination of genes that are turned on or off (expressed or repressed), and this is what dictates how a cell functions