Sexual Dimorphism of Rat Cells in vitro

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Science  11 Mar 1960:
Vol. 131, Issue 3402, pp. 740
DOI: 10.1126/science.131.3402.740


Large peripheral chromocenters occurred in about 10 percent of the nuclei of female rat cells grown in vitro but occurred on the average in less than 1 percent of the nuclei of male cells. Similar chromocenters occurred in hamster and mouse nuclei in vitro, but no clear-cut sexual difference was demonstrable.

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