A translocation between chromosomes 8 and 14 results in an enhancer element in direct control of the c-myc gene. If the enhancer element leads to over- expression of c-myc, this mutation is called:. a. a loss of function mutation
b. a checkpoint mutation
c. a mutation that leads to apoptosis (death) of cells
d. a gain of function mutation
e. a transposon mutation
f. a targeted mutation