Definition of Barr body in English:

Barr body

noun bɑːˈbɒdiˈbär ˌbädē

Physiology

A small, densely staining structure in the cell nuclei of females, consisting of a condensed, inactive X chromosome. It is regarded as diagnostic of genetic femaleness.
〔生理〕巴氏小体，性染色质小体
Example sentencesExamples
- If the Barr bodies of a normal female were missing, she would exhibit Turners Syndrome.
- 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.
- If the child is genetically female then a Barr body should be evident in approximately 10-20 percent of the cells.
- The formation of Barr bodies is the strategy that humans use for what is called dosage compensation.
- We now know that the ‘darkly staining’ Barr body is the condensed, inactive X chromosome.

Origin

1960s: named after the Canadian anatomist M. L. Barr (1908–95).

Definition of Barr body in US English:

Barr body

nounˈbär ˌbädē

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.
〔生理〕巴氏小体，性染色质小体
Example sentencesExamples
- The formation of Barr bodies is the strategy that humans use for what is called dosage compensation.
- 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.
- If the Barr bodies of a normal female were missing, she would exhibit Turners Syndrome.
- We now know that the ‘darkly staining’ Barr body is the condensed, inactive X chromosome.
- If the child is genetically female then a Barr body should be evident in approximately 10-20 percent of the cells.

Origin

1960s: named after the Canadian anatomist M. L. Barr (1908–95).

词汇	Barr body
释义	Definition of Barr body in English: Barr body noun bɑːˈbɒdiˈbär ˌbädē Physiology A small, densely staining structure in the cell nuclei of females, consisting of a condensed, inactive X chromosome. It is regarded as diagnostic of genetic femaleness. 〔生理〕巴氏小体，性染色质小体 Example sentencesExamples If the Barr bodies of a normal female were missing, she would exhibit Turners Syndrome. 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. If the child is genetically female then a Barr body should be evident in approximately 10-20 percent of the cells. The formation of Barr bodies is the strategy that humans use for what is called dosage compensation. We now know that the ‘darkly staining’ Barr body is the condensed, inactive X chromosome. Origin 1960s: named after the Canadian anatomist M. L. Barr (1908–95). Definition of Barr body in US English: Barr body nounˈbär ˌbädē 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. 〔生理〕巴氏小体，性染色质小体 Example sentencesExamples The formation of Barr bodies is the strategy that humans use for what is called dosage compensation. 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. If the Barr bodies of a normal female were missing, she would exhibit Turners Syndrome. We now know that the ‘darkly staining’ Barr body is the condensed, inactive X chromosome. If the child is genetically female then a Barr body should be evident in approximately 10-20 percent of the cells. Origin 1960s: named after the Canadian anatomist M. L. Barr (1908–95).
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