Barr Body Classification
A Barr body represents an inactivated X chromosome within the somatic cells of female mammals.
Chromatin State
The chromatin forming the Barr body is highly condensed and transcriptionally silent. This condensed state is characteristic of heterochromatin.
Facultative vs. Constitutive Heterochromatin
- Facultative heterochromatin refers to regions that are transcriptionally silent but can be reversibly activated.
- Constitutive heterochromatin is permanently silenced and typically found in regions like centromeres and telomeres.
Since X chromosome inactivation can be reversed (e.g., during oogenesis), the Barr body is classified as facultative heterochromatin.
Conclusion
Therefore, the Barr body serves as a prime example of facultative heterochromatin.
Similar Questions
- In Polymerase Chain Reaction (PCR) primers are used to provide:
- To detect specific proteins in a sample we use:
- The most commonly used stain for visualising/observing the DNA fragments is:
- The target sequence in a DNA can be determined/ identified in Southern blotting by:
- R$_f$ value depends on:
Repeated sequence TTAGGC in humans is present at :
AATCCG- The attachment site for microtubules that separates chromosomes during cell division:
- The genetic material of a prokaryotic cell is present in:
- During denaturation which bonds in protein structure are NOT broken:
- The degradation of stored glycogen in liver and muscles is known as:
Important Questions from Mixed Topic (CUET PG)
- Who was the founder of Bolshevik Communist party?
- What is the key guide to statecraft in the realist tradition?
- Chronologically arrange the events in the Cold War period.
A. Berlin Wall is constructed
B. Communist China joins the UN
C. Soviet invasion of Czechoslovakia
D. Berlin Blockade
Choose the correct answer from the options given below: Morgenthau's principles of political realism are:
A. Politics is rooted in permanent and unchanging human nature which is basically self centred, self-regarding and self-interested
B. Politics is an autonomous sphere of action and cannot therefore be reduced to morals
C. International Politics is an arena of conflicting self-interests
D. The ethics of international relations is situational ethics which is very different from private morality
Choose the correct answer from the options given below:Who among the following political thinkers consider the anarchical self help system to be a compelling factor for States to maximise their relative power positions?
