What are some examples of parent and child relationships in Elie Wiesel's Night?

There are contrasting examples of parent and child relationships, particularly father and son, in Elie Wiesel's Night. Throughout the memoir, Elie does his best to remain faithful to his father, despite incredible difficulties and brutality. In fact, for Elie and his father, their roles are increasingly reversed over the course of the story. Elie takes on the parental role as he is constantly vigilant to his father's needs and survival. He feels guilty that he cannot do more for his father, who seems to age quickly in the camps. Unfortunately, Elie is sometimes paralyzed by fear in the face of his father's tormentors. Mostly, however, he is an important resource for his father. At one point in the forced march from Buna to Gleiwitz, as Elie is desperate to stop and even to die, he forces himself to go on for the simple reason that he cannot let his father down:

My father's presence was the only thing that stopped me....He was running at my side, out of breath, at the end of his strength, at his wit's end. I had no right to let myself die. What would he do without me? I was his only support. 

Again, at Gleiwitz, Elie show his devotion to his father during one of the infamous selections. When his father is sent to the left, and certain death, Elie goes after him and causes such confusion that he is able to direct his father back to the right and survival. Finally, however, there is nothing Elie can do and his father dies of dysentery at Buchenwald. 

In contrast, there are two examples of father and son relationships which totally break down in the midst of the violence and inhumanity of the concentration camps. In section six, Elie tells the story of Rabbi Eliahou and his son. During the forced march from Buna, the Rabbi's son had attempted to distance himself from his father. Unlike Elie, the boy was perfectly willing to abandon his father if he felt it would lead to his own survival. In section seven, Elie relates an even more brutal story of a son who hastens his father's death over a morsel of bread. As the Jews pass through a German town, the civilians throw pieces of bread into the train cars just to see the men fight over the food. Elie witnesses a man clutching a piece who is instantly attacked by another man that turns out to be his own son:

"Meir, Meir, my boy! Don't you recognize me? I'm your father...you're hurting me...you're killing your father! I've got some bread...for you too...for you too..."

While Elie is certainly not perfect in his relationship with his father, he never resorts to abandonment or violence. He is with his father almost to the end, describing the last time he saw him:

Bending over him, I stayed gazing at him for over an hour, engraving into myself the picture of his blood-stained face, his shattered skull.