Он крепко обхватил шею сына. | He threw his arms around his son's neck, and hugged him. |
Его шея была чёрная от загара. | His neck was brown from the sun. |
NB When the word шея functions as a subject and does not have a descriptive modifier, the construction шея у + Genitive is often preferred to (a) and (b), above: | |
Шея у него была чёрная от загара. | His neck was brown from the sun. |