Final answer:
A localized epigenetic change that does not affect gene expression in other regions is known as a cis-epigenetic mechanism.
Step-by-step explanation:
If an epigenetic change is maintained only at a given site and does not affect the expression of a gene elsewhere in the nucleus, it is a cis-epigenetic mechanism. The term epigenetic refers to heritable changes that regulate gene expression without altering the DNA sequence. These changes can be due to modifications such as methylation and acetylation of histones or DNA which affect the chromatin state and thereby regulate gene expression. In a cis-epigenetic change, the regulation is localized to a specific area of DNA influencing only the genes in close proximity to this region.
If an epigenetic change is maintained only at a given site and does not affect the expression of a gene elsewhere in the nucleus, it is a cis-epigenetic mechanism.Epigenetic changes involve alterations to genes that do not change DNA sequence but modify the chromosomal structure. These changes can either open or close the chromosomal region encoding a gene, allowing or preventing transcription. If the epigenetic change only affects a specific site and not gene expression elsewhere, it is referred to as cis-epigenetic.