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Answered 2012-05-26 07:06:38

A Barr body is the inactivated X chromosome that is usually found in the nuclei of female somatic cells.

It can also occur in males when there is an abnormality and the male is XXY instead of the normal XY, a condition known as Klinefelter's syndrome. In this case, the male somatic cells would also contain a Barr body.


The Barr body is the highly-condensed chromatin structure taken up by an inctivated X chromosome. The number of Barr bodies equal the number of inactive chromosomes.

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How many Barr bodies cell does XXXY has?

A Barr body is an inactivated X chromosome. An XXXY cell would contain 1 Barr Body. Men have no Barr bodies, and women have 1.

How is a barr body formed?

A Barr body is formed in females. One of their X-chromosomes is randomly "shut off". The chromosome that is turned off is pushed to the side of the nucleus forming a Barr body.

What is the percentage of Barr body in normal humans?

Females usually have one Barr body; males usually have none.

The formation of a Barr body?

not sure but the formation of Barr body must be regulated by some signaling mechanism at the early embryonic developmental stage.

A Barr body is normally found in the nucleus of which kind of human cell?

A barr body is normally found in the nucleus of which kind of human cell?

Is barr body found in 80 percent polymorphonuclear leucocytes?

False. Sex chromatin/barr body can be seen as a 'drumstick' in approx. 5% of polymorphonuclear leucocytes.

Do people with Klinefelter's syndrome have an inactivated X chromosome or a bar body?

People with Klinefert´s syndrome have one barr body. Yes , the number of barr bodies in a cell is always equal to the number of X chromosomes minus one. For example in the XXY chromosome there is one Barr body

What is the dense region in nucleus of female cells?

The Barr Body

What are the symptoms of the Epstein Barr Virus?

The Epstein Barr Virus causes mononucleosis. Symptoms of infection with the Epstein Barr Virus include extreme fatigue, sore throat, loss of appetite, body aches, and headache.

A Barr body is?

the inactive X chromosome found on the nuclear membrane.

Are Barr body projection of extra chromatin on the an X chromosome?


An inactive X chromosome which is found in females is referred to as?

Barr Body

What is a condensed inactive X chromosome called?

it is called a Barr Body

Where is a barr body found?

It is found in the nuclei of the somatic cells in females only.

Occurs when one x-chromosomes is randomly turned off and forms a barr body?

An X-inactivation occurs when one X-chromosome is randomly turned off and forms a Barr body. It is also known as lyonization.

How does a barr body form?

A Barr body is a condensed, inactivated X chromosome present in most female mammals in the nuclei. It is used to determine if an athlete is make or female. It is named after the person who first described it: Murray L. Barr. The female has two X chromosomes, and all female egg cells normally carry a single X.In each somatic cell of a normal female, one of the X chromosomes is randomly deactivated. This deactivated X chromosome can be seen as a small, dark-staining structure called the Barr body in the cell nucleus.The formation of the Barr body is totally random. This can be seen in female cats that have a color pattern called tortoiseshell and also calico. Only one color is expressed (at random) per cell.

Why do females have barr bodies and males do not?

Both Male and Female have the barr body, but in different chromosones. The above statement is INCORRECT. Barr bodies are formed mainly in females due to females having two X chromosomes while males normally have only one X chromosome (and a Y chromosome). The Barr body is formed from the inactive X chromosome. Males can sometimes be born with a mutation of having too many X chromosomes, in which case Barr Bodies would also be found in those specific males which typically causes Klinefelter's Syndrome.

What is the percent of barr body in normal humans?

0-2 % in males and 15-20% in females

What does a Barr body in a mammalian female cell represents?

x chromosome... since female body has single type of chromosome, X chromosome

What has the author Michael G Barr written?

Michael G. Barr has written: 'The Barr family tracker'

Did Roseanne Barr die?

No, Roseanne Barr is not dead.

How tall is Jesse Barr?

Jesse Barr is 6'.

How tall is Terry Barr?

Terry Barr is 6'.

How tall is Tristan Barr?

Tristan Barr is 6'.

How old is Ferrin Barr Jr.?

Ferrin Barr Jr. ("Jesse Barr" and "Jimmy Jack Barr") is 55 years old (birthdate April 14, 1959).