Acertain drosophila protein-encoding gene has one intron. if a large sample of null alleles of this gene is examined, will any number of the mutant sites be expected(a) in the exons? (b) in the intron? (c) in the promoter? (d) in the intron-exon boundary?

a) Yes

b) Yes

c) Yes

d) Yes

Explanation:

a. In the exons?

Yes mutant site will be expected. It will transcript-ed as well and it can be a polypeptide depending on the mutation type.

b. In the intron?

Yes mutant site will be expected. It will be transcript-ed as well and it cannot be a  polypeptide  

c. In the promoter?

Yes mutant site will be expected. It will not be transcript-ed and it cannot be a  polypeptide

d. In the intron-exon boundary?

Yes mutant site will be expected. It will be transcript-ed and it cannot be a  polypeptide

currents is the correct answer.