Results 291 to 300 of about 128,998 (343)
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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.
W, Traut, F, 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.
W, Traut, F, Marec
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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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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.
D M, VERNINO, D M, LASKIN
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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 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.
T, Tominaga, E W, Page
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Historical Studies in the Natural Sciences, 2014
In 1949, Canadian anatomist Murray Barr announced the discovery of a peculiar entity in the cell nucleus that was present in females and absent in males. The identity of this entity remained uncertain for a decade even though Barr hypothesized a relationship between it and the sex chromosomes and called it the “sex chromatin.” This hypothesis inspired ...
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In 1949, Canadian anatomist Murray Barr announced the discovery of a peculiar entity in the cell nucleus that was present in females and absent in males. The identity of this entity remained uncertain for a decade even though Barr hypothesized a relationship between it and the sex chromosomes and called it the “sex chromatin.” This hypothesis inspired ...
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Sex chromatin in avian species
Canadian Journal of Zoology, 1972A comparison of nuclear chromatin bodies in squash preparations of interphase cell nuclei of white Chinese geese (Cygnopsis cygnoid), domestic ducks (Anas platyrynchos var. domestica), and domestic chicken (Gallus domesticus) with those of ferret (Putorius furo) embryonic cells from skin, gastrointestinal muscularis, kidney, and spinal cord was made ...
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Sex Chromatin and Human Chromosomes
1962Publisher Summary This chapter reviews the work done on sex chromatin and human chromosomes in the past few years. Evidence reviewed suggests that sex chromatin is chromosomal in origin and is most likely formed from one X chromosome only. There is overwhelming support for the diploid number of human chromosomes being 46 and not 48.
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