Why heterochromatin takes dark stain during interphase and light staining during divitional phase?
Answers
During interphase, most of the chromatin takes up light stain but a small amount of chromatin ineukaryotic nucleus appears very darkunder microscope. The light areas are euchromatin while the dark patches are heterochromatin. It is thought that euchromatin is in more hydrated and loosely arranged condition.
Answer:
Answer
The chromatin material which takes darker stain in interphase is called Heterochromatin. Heterochromatin is a tightly packed form of DNA, which comes in different varieties. These varieties lie on a continuum between the two extremes of constitutive and facultative heterochromatin. Both play a role in the expression of genes. Heterochromatin has been associated with several functions, from gene regulation to the protection of the integrity of chromosomes; some of these roles can be attributed to the dense packing of DNA, which makes it less accessible to protein factors that usually bind DNA or its associated factors