Abstract
A SEX difference in the morphology of intermitotic nuclei has been described in the nervous system1 and various tissues and organs of the mature cat2. Nuclei of females contain a special mass of chromatin, the sex chromatin, which is seldom seen in nuclei of males. Evidence available so far suggests that the sex chromatin of females represents heterochromatic portions of the two X chromosomes.
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References
Barr, M. L., and Bertram, B. G., Nature, 163, 676 (1949). Barr, M. L., Bertram, L. F., and Lindsay, H. A., Anat. Rec., 107, 283 (1950). Barr, M. L., Exp. Cell Res., 2, 288 (1951).
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Moore, K. L., and Barr, M. L., J. Comp. Neurol., 98, 213 (1953).
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GRAHAM, M. Detection of the Sex of Cat Embryos from Nuclear Morphology in the Embryonic Membrane. Nature 173, 310–311 (1954). https://doi.org/10.1038/173310a0
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DOI: https://doi.org/10.1038/173310a0
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