Facultative heterochromatin
Facultative heterochromatin is formed during development and is often the condensation of regions which contain coding genes. An example of facultative heterochromatin is the formation of Barr bodies (inactivated X chromosomes), which occurs during cell division[1]. The silencing of genes in facultative heterochromatin may be reversed, but if the phenotype of the organism is stable then this process is unlikely[2].
References:
- ↑ BioMed Central, Saksouk N, Simboeck E, Déjardin J, Constitutive heterochromatin formation and transcription in mammals. 15th January 2015 [cited:03/12/2017]; Available from: https://epigeneticsandchromatin.biomedcentral.com/articles/10.1186/1756-8935-8-3
- ↑ Armstrong L, Epigenetics. 1st Edition, New York: Garland Science. 2014