Call or no call?

[Dan_ref]

A1 in paint receives a pass, turns, makes his move around B1 to the basket and goes high for a dunk. B1 stays with him, going as high & gets a hand on the ball. B1 also gets some side to side body contact, not a lot but it's there. No real arm contact. A1 misses the dunk. Call or no call? A1 makes the dunk. Call or no call? How about if A1 layed it up instead of dunked? (For you nitpickers held ball or 3 seconds is not a consideration. )

Similar play: A1 on a breakaway drives in for a layup. B1 is following closely, B1 gets a hand on the ball as
A1 is in the air for the layup, followed by obvious body contact. The layup goes in. Call or no call? The layup does not go in. Call or no call?