Definition of Barr body in English:

Barr body

Syllabification: Barr bod·y
Pronunciation: /ˈbär ˌbädē


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.
    More 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.

More definitions of Barr body

Definition of Barr body in:

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day maelstrom
Pronunciation: ˈmālˌsträm
a powerful whirlpool in the sea