411 REFERENCE · Wiktionary
Barr body
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
Named after discoverer Murray Barr.
Noun
en biology A sex chromosome inactivated by packing in heterochromatin.
en Men with Klinefelter syndrome (47,XXY karyotype) have a single Barr body, whereas women with a 47,XXX karyotype have two Barr bodies.
See also
en lyonization
en eponyms