Final answer:
In embryonic development, both melanocytes and germ cells undergo the process of differentiation. This process is regulated by chemical signals from the embryonic environment, and it is essential for organs to develop from the germ layers.
Step-by-step explanation:
In embryonic development, both melanocytes and germ cells undergo the process of differentiation. During differentiation, embryonic stem cells express specific genes that determine their ultimate cell type. This process is regulated by chemical signals from the embryonic environment. Differentiation is essential for organs to develop from the germ layers.