title: Selecting a mammalian species for the separation of X- and Y-chromosome-bearing spermatozoa.
abstract: All (524) male karyotypes in An Atlas of Mammalian Chromosomes (Hsu & Benirschke, 1967-1977) were visually estimated for the chromatin difference between the X- and Y-chromosome-bearing spermatozoa. After more exact measurement of axial chromatid length for 100 karotypes, 24 species were found in which the difference between X and Y chromosomes was greater than 6.2%. It is suggested that such species would be the best for attempts to separate the X- and Y-bearing spermatozoa.
mesh_terms: D000818:Animals; D008297:Male; D008322:Mammals; D012728:Sex Chromatin; D012730:Sex Chromosomes; D012743:Sex Preselection / Q000379:methods; D013045:Species Specificity; D013094:Spermatozoa / Q000648:ultrastructure*