Describe a situation in which an alteration to a DNA base sequence does not affect protein shape and function.

The bases on a DNA strand do not effect the shape, and they just effect the bases on the DNA strands. If a strand had the base of "G" with an opposite strand of "C" and you switch the "g" base to an "A" base, the opposite "C" base would flip to a "T" base

G matches with c

A matches with t