scholarly journals Barr Body

2020 ◽  
Author(s):  
Keyword(s):  
Barr Body

The disappearing Barr body in breast and ovarian cancers

2007 ◽  
Vol 7 (8) ◽  
pp. 628-633 ◽  
Author(s):  
Gayle J. Pageau ◽  
Lisa L. Hall ◽  
Shridar Ganesan ◽  
David M. Livingston ◽  
Jeanne B. Lawrence
Keyword(s):  
Barr Body ◽  
Ovarian Cancers

Weight differences in rat embryos prior to sexual differentiation

Development ◽  
1977 ◽  
Vol 40 (1) ◽  
pp. 259-263
Author(s):  
William J. Scott ◽  
Joseph F. Holson
Keyword(s):  
Sexual Differentiation ◽  
Thymidine Incorporation ◽  
Weight Basis ◽  
Unit Weight ◽  
Gonadal Differentiation ◽  
Barr Body ◽  
Endocrine Activity ◽  
Rat Embryos ◽  
Weight Protein ◽  
Amniotic Membranes

Sex of day-12 rat embryos was determined using Barr body counts made on spreads of amniotic membranes examined histologically. Embryonic weight, protein content and rate of thymidine incorporation were compared in male and female embryos. Male embryos were found to be heavier and accordingly to contain more protein on absolute but not on per unit weight basis. The rate of thymidine incorporation did not differ in the two sexes. Since gonadogenesis in day-12 rat embryos is rudimentary, with gonadal differentiation of sex not yet apparent, the increased weight suggests that sex-linked genes exist which influence body growth prior to gonadal endocrine activity.

scholarly journals Sex Determination by Observation of Barr Body in Teeth Subjected to High Temperatures

2011 ◽  
Vol 29 (1) ◽  
pp. 199-203 ◽  
Author(s):  
Iván Suazo Galdames ◽  
Alex Flores ◽  
Ignacio Roa ◽  
Mario Cantín ◽  
Daniela Zavando
Keyword(s):  
Sex Determination ◽  
High Temperatures ◽  
Barr Body

Barr Body

2002 ◽  
Author(s):  
Alan P. Wolffe ◽  
Fyodor D. Urnov
Keyword(s):  
Barr Body

Investigations on the socalled barr body in smears from the Oral Mucosa inPongo Pygmaeus, Gorilla GorillaandPan Troglodytes

1971 ◽  
Vol 38 (2) ◽  
pp. 171-175
Author(s):  
Carla Scapitta ◽  
Matilde Chiarelli Sarti ◽  
W. C. Osman Hill
Keyword(s):  
Oral Mucosa ◽  
Barr Body

scholarly journals Higher concentrations of histone macroH2A in the Barr body are correlated with higher nucleosome density

2000 ◽  
Vol 10 (23) ◽  
pp. 1531-1534 ◽  
Author(s):  
Pierre-Yves Perche ◽  
Claire Vourc'h ◽  
Lara Konecny ◽  
Catherine Souchier ◽  
Michel Robert-Nicoud ◽  
...  
Keyword(s):  
Barr Body ◽  
Nucleosome Density

scholarly journals X-inactivation normalizes O-GlcNAc transferase levels and generates an O-GlcNAc-depleted Barr body

2014 ◽  
Vol 5 ◽  
Author(s):  
Stéphanie Olivier-Van Stichelen ◽  
John A. Hanover
Keyword(s):  
X Inactivation ◽  
Barr Body ◽  
Glcnac Transferase

A STUDY OF BARR BODIES IN CASES OF PRIMARY AMENORRHEA.

2021 ◽  
pp. 43-45
Author(s):  
M Hema Radhika ◽  
G. Krupa Elena
Keyword(s):  
Genetic Factors ◽  
Rapid Test ◽  
Psychological Trauma ◽  
Primary Amenorrhea ◽  
Barr Body ◽  
Primary Amenorrhoea ◽  
Buccal Smear ◽  
Negative Condition ◽  
The Subject ◽  
Normal Males

BACKGROUND: Barr body (or) X- chromatin is a heterochromatin mass seen in all somatic cells of females species. They account to nearly 80-90% in females and 1-3% of cells of normal males. Primary Amenorrhea a clinical condition is of varied aetiology, however Genetic factors being the major cause. Either a structural or a numerical anomaly like X- monosomy of a female results in failure of commencement of menstruation. Identication of chromatin negative condition in patients of primary amenorrhoea constitutes my study. The study i METHODOLOGY: s conducted on 58 patients who visited Obstetrics Gynaecology clinics Visakhapatnam district with presenting complaint of primary amenorrhea. Buccal smear examination is done to all the patients and observed under the microscope for Barr bodies. Photographs were taken and the observations were tabulated and analysed. Absence of Barr Body was ob RESULTS: served in 28 cases (chromatin negative) and 26 cases were chromatin positive and 4 cases showed mosaicism. Primary CONCLUSION: Amenorrhea due to chromosomal aberrations is a serious condition as it is associated with intense psychological trauma along with physical. In Turner's syndrome single X-chromosome is present (45XO), the subject is female in phenotype, but the ovaries are rudimentary (Streak Gonads) and absence of development of secondary sexual characters. So buccal smear is a simple, rapid test that will enable us to decide which patients are to be referred for further investigations to conrm the diagnosis.

Barr Body

2008 ◽  
pp. 192-192
Keyword(s):  
Barr Body
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