Definition of Barr body in English:

Share this entry

Barr body

Pronunciation: /ˈbär ˌbädē/

noun

Anatomy & Physiology
A small, densely staining structure in the cell nuclei of female mammals, consisting of a condensed, inactive X chromosome. It is regarded as diagnostic of genetic femaleness.
Example sentences
  • In some tissues, the inactive X chromosome can be identified in the nucleus as a Barr body and X inactivation provides an important model for the inheritance of gene expression.
  • The formation of Barr bodies is the strategy that humans use for what is called dosage compensation.
  • If the Barr bodies of a normal female were missing, she would exhibit Turners Syndrome.

For editors and proofreaders

Syllabification: Barr bod·y

Share this entry
 

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.