characterstics of euchromatins?

Answer 1

Eu (or true) chromatin was originally defined as lightly staining sections of chromosomes. Darkly staining regions are known as heterochromatic. It is now known that the difference is due to the degree of packaging of eu- vs. heterochromatin. Euchromatin is less tightly packed and therefore more open to the transcriptional apparatus of the nucleus. Euchromatin contains the regions of chromosomes more actively transcribed in the given cell.

Answer 2

Euchromatin is transcriptionally active because the degree of compactness is less enough to allow RNA polymerase to enter the site of promoter and begin transcription.It will stain less deeply with a nuclear dye.
On the other hand, the heterochromatin is highly condensed and therefore unavailable for transcription.It is stained deeply with a nuclear dye.
Some heterochromatin are constitutive, which means that they remain permanently condensed and hence never transcribed.
Some are facultative heterochromatin. They alternate between being highly coiled and less coiled, that is, they are reversible and switch between the two states, condensed and less condensed. When they are less condensed they are called euchromatin.

Answer 3

Euchromatin is the 'true chromatiin". The DNA that is packed there is loosly packed making it accessibly to read.