Barr body
the deeply staining inactive X chromosome seen in the interphase nucleus of female mammal cells
Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row ...
Barr body
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Barr body
In those species in which sex is determined by the presence of the Y or W chromosome rather than the diploidy of the X or Z, a Barr body is the inactive X chromosome in a female cell, or the inactive Z in a male.
Barr body Inactivated X-chromosome in mammalian females. Although inactivated, the Barr body is replicated prior to cell division and thus is passed on to all descendant cells of the embryonic cell that had one of its X-chromosomes inactivated.
Barr body
A dense object lying along the inside of the nuclear envelope in female mammalian cells, representing an inactivated X chromosome.
basal body ...
Barr body An X chromosome which is condensed and inactive and which shows as a dark staining blob in an interphase nucleus.
Barr body: Also called sex-chromatin body, which represents the inactivated X chromosome in the nucleus of somatic mammalian cells. Normally only seen in female cells and not in male cells.
Barr body A heterochromatic X chromosome usually found in the nucleus of female mammals.
barrier island A long and narrow island that is built by waves along the coast.
Example: Barr body
One X chromosome is inactivated in females by producing a tightly-wound structure called a Barr body.
Example: Lampbrush Chromosomes ...
[lambda] [phiX-174] [T2] [T4] Bacteroidetes Balanced polymorphism Barbiturate Barcoding Barr body BaseMolecule or ion that can take a proton from an acid.
Barr body -- the condensed single X-chromosome seen in the nuclei of somatic cells of female mammals. base pair a pair of hydrogen-bonded nitrogenous bases (one purine and one pyrimidine) that join the component strands of the DNA double helix.
Because of the formation of the Barr body early during embryonic development.
The hypothesis, named after Mary Lyon who stated it, suggesting that doseage compensation in mammals is by inactivation of all but one X chromosome in cells with more than one X chromosome. The Barr body, visible in some female mammalian cells, ...
The inactivated X is visible during interphase in mitosis as a condensed chromosome, called a Barr body. It replicates in the S (synthesis) phase of the cell cycle later than does the active copy.
 See also: Chromosome, Human, X chromosome, Chromosomes, Cells
  
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