The phenomenon in D.melanogaster known as Position-Effect Variegation (PEV)provides powerful evidence that:
A)DNA is the genetic material.
B)posttranscriptional mechanisms regulate gene expression.
C)transcriptional mechanisms regulate gene control.
D)chromatin structure is unable to regulate gene expression.
E)chromatin structure is able to regulate gene expression.

Question

Quizplus · Accepted Answer

PEV occurs when a gene is moved to a different chromatin environment in which it is subject to variegated expression, either fully active or fully repressed. This phenomenon provides evidence that chromatin structure can regulate gene expression, and in this case, cause variegation. Therefore, choice E is the best answer.

The Phenomenon in D