Two important processes that produce lasting but reversible changes in gene expression are histone modification and __________.
A) imprinting
B) crossing-over
C) x-linked gene mapping suppression
D) DNA methylation

Question

Quizplus · Accepted Answer

Histone modification and DNA methylation are both important processes that can produce lasting but reversible changes in gene expression. Histone modification involves the addition or removal of specific chemical groups to histone proteins, which can affect the accessibility of the DNA to the transcriptional machinery. DNA methylation involves the addition of a methyl group to cytosine residues in DNA, which can also change the accessibility of the DNA and affect gene expression. Imprinting, crossing-over, and x-linked gene mapping suppression are not processes that directly affect gene expression through histone or DNA modifications.

Two Important Processes That Produce Lasting but Reversible Changes in Gene