I think i see what he means the answer is B.
but correct me if i'm wrong.
Yes, because it would be like shoving something into a crowed place, rather than shoving something into a uncrowded place.<span />
Answer:
Silencer
Explanation:
Silencers are the position and orientation free sequences that are present outside the protein-coding sequence of a gene. Silencers serve as a binding site for some transcriptional regulatory proteins that tend to inhibit gene expression. Binding of these "repressor" proteins to the silencers inhibits the gene expression.
The deletion of silencers from DNA would increase the rate of the gene expression as the inhibitory transcription regulatory proteins do not have binding sites to inhibit the gene expression. Therefore, the deletion of silencer sequences of the beta-globin gene would have caused the increased rate of its expression.
A species could gain negative traits through evolution. So, evolution does not always mean progress.
