In a diploid organism, the IND gene encodes a transcriptionalactivator that binds to an enhancer upstream of the EXP gene. TheREP2 gene encodes a repressor protein that binds to IND and blocksits activation domain in the absence of an inducer called costar.In the presence of costar, REP2 protein no longer blocks theactivation domain of IND. Both genes (IND and RE2) are expressed inall cells. There are complete loss of function mutants availablefor both IND (designated IND-) and REP (REP-).
How much EXP protein would you expect to see in the followingconditions. Briefly justify each answer:
a). wild-type cells, no costar present
b). wild-type cells, costar present
c). homozygous REP2- mutant, costar absent
d). homozygous REP2- mutant, costar present e). homozygous IND-mutant, costar absent
f). homozygous IND- mutant, costar present
