  In a previous paper [Blado G, Owens C, and Meyers V 2014 Quantum Wells and
the Generalized Uncertainty Principle Eur. J. Phys. 35 065011], we showed that
quantum gravity effects can be discussed with only a background in
non-relativistic quantum mechanics at the undergraduate level by looking at the
effect of the generalized uncertainty principle (GUP) on the finite and
infinite square wells. In this paper, we derive the GUP corrections to the
tunneling probability of simple quantum mechanical systems which are accessible
to undergraduates (alpha decay, simple models of quantum cosmogenesis and
gravitational tunneling radiation) and which employ the WKB approximation, a
topic discussed in undergraduate quantum mechanics classes. It is shown that
the GUP correction increases the tunneling probability in each of the examples
discussed.
