Results 281 to 290 of about 123,835 (338)
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Sex chromatin and sex hormones
American Journal of Obstetrics and Gynecology, 1967Abstract A study was performed on the influence of sex hormone administration on the incidence of nuclear sex chromatin bodies in women. Testosterone uniformly led to a marked reduction in the incidence of sex chromatin body while progesterone produced a reduction in the majority of cases.
Spas A. Spasov, Dokumov Si
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The control of sex chromatin [PDF]
Cytogenetic and Genome Research, 1968 Sex chromatin counts for more than 50 individuals with three or more X chromosomes in their complement were analyzed. The observed distribution of cells with 0, 1, 2,...n sex chromatin bodies in polysomic-X individuals was compared with the binomial distribution expected on the assumption of a constant probability that an X chromosome will form a ...
O.J. Miller, Dorothy Warburton
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The Quarterly Review of Biology, 1996
Like mammals, Lepidoptera possess female-specific sex chromatin. In a compilation of new and published data, 81% of the 238 investigated Lepidoptera species display one or more heterochromatin bodies in female somatic interphase cells, but not in male cells.
Walther Traut, FrantiĊĦek Marec
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Like mammals, Lepidoptera possess female-specific sex chromatin. In a compilation of new and published data, 81% of the 238 investigated Lepidoptera species display one or more heterochromatin bodies in female somatic interphase cells, but not in male cells.
Walther Traut, FrantiĊĦek Marec
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Canadian Journal of Genetics and Cytology, 1966
In 1947 Dr. Murray L. Barr interested a graduate student, Ewart G. Bertram, in an investigation of possible structural changes in the nerve cells following intense stimulation. In the course of their studies Barr and Bertram, working on cats, noted that the hypoglossal neurons of some animals had a nucleolar satellite which was absent in others.
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In 1947 Dr. Murray L. Barr interested a graduate student, Ewart G. Bertram, in an investigation of possible structural changes in the nerve cells following intense stimulation. In the course of their studies Barr and Bertram, working on cats, noted that the hypoglossal neurons of some animals had a nucleolar satellite which was absent in others.
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Sex Chromatin in Mammalian Bone
Science, 1960The presence of a sex chromatin body similar to that reported in other tissues has been demonstrated in the nuclei of osteoblasts, osteocytes, and periosteal cells from female dogs and cats.
Daniel M. Vernino, Daniel M. Laskin
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Sex Chromatin and Chromosomes in Man
Postgraduate Medicine, 1961Recent developments in experimental embryology, discovery of the sex chromatin, and improved methods of study in the field of cytogenetics have led to advances in the determination of genetic sex in man. These studies also offer new avenues of clinical applications in cases involving human intersexual conditions.While information already available has ...
D. J. Patanelli, W. O. Nelson
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The sex chromatin count in pregnancy
American Journal of Obstetrics and Gynecology, 1970Abstract The role of specific hormones in activation of the second X chromosome in women is studied by relating changes in sex chromatin count during pregnancy and the menstrual cycle to well-known hormone fluctuations of these periods.
Fred V. Lucas, Mary S. Case, Townsend Jf
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Cytogenetic and Genome Research, 1967
A simple method is described by which sex chromatin can be studied in the cells of the external root sheath of single hairs. From a human capital hair many thousands of scorable nuclei can be obtained. Since this material is suitable for orcein staining, preparations are ready for analysis within a few minutes.
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A simple method is described by which sex chromatin can be studied in the cells of the external root sheath of single hairs. From a human capital hair many thousands of scorable nuclei can be obtained. Since this material is suitable for orcein staining, preparations are ready for analysis within a few minutes.
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The Significance of the Sex Chromatin*
1966Publisher Summary This chapter discusses the significance of the sex chromatin. Several morphological aspects of the sex chromatin are of interest, especially when one bears in mind that this chromocenter is a single X chromosome in a condensed or positively heteropycnotic state. The following account refers to cells of females.
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Sex chromatin of trophoblastic tumors
American Journal of Obstetrics and Gynecology, 1966Abstract The incidence of sex chromatin was determined in 48 trophoblastic tumors. Of 30 cases of hydatidiform mole and chorioadenoma destruens, 29 (97 per cent) were sex chromatin positive or female. Fourteen (78 per cent) of 18 choriocarcinomas were also sex chromatin positive.
Ernest W. Page, Toshiro Tominaga
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