  Multi-dimensional simulations of the neutrino-driven mechanism behind
core-collapse supernovae have long shown that the explosions from this
mechanism would be asymmetric. Recently, detailed core-collapse simulations
have shown that the explosion may be strongest in a single direction. We
present a suite of simulations modeling these ``single-lobe'' supernova
explosions of a 15 solar mass red supergiant star, focusing on the effect these
asymmetries have on the gamma-ray emission and the mixing in the explosion. We
discuss how asymmetries in the explosion mechanism might explain many of the
observed ``asymmetries'' of supernovae, focusing on features of both supernova
1987A and the Cas A supernova remnant. In particular, we show that single-lobe
explosions provide a promising solution to the redshifted iron lines of
supernova 1987A. We also show that the extent of mixing for explosive burning
products depends sensitively on the angular profile of the velocity asymmetry
and can be much more extensive than previously assumed.
