Arrangement of centromeres in mouse cells |
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Authors: | T. C. Hsu John E. K. Cooper M. L. Mace Jr. B. R. Brinkley |
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Affiliation: | (1) Department of Biology, The University of Texas M. D. Anderson Hospital and Tumor Institute at Houston, Houston, Texas, USA |
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Abstract: | Applying a staining procedure which reveals constitutive heterochromatin to cytological preparations of the mouse (Mus musculus), one detects heterochromatin pieces at the centromeric areas of all chromosomes except the Y. The Y chromosome is somewhat heteropyenotic in general but possesses no intensely stained centromeric heterochromatin. The arrangement of the centromeric heterochromatin in interphase cells is apparently specific for a given cell type. In meiotic prophase, centromeric heterochromatin may form clusters among bivalents. From the location of the centromeric heterochromatin of the X chromosome in the sex bivalent, it is concluded that the association between the X and Y (common end) in meiosis is limited to the distal portions of the sex elements. |
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