Summary
The girdles and long bones of 10 individuals of each of the three strains A/Gr, C57BL/Gr (Subline VI) and CBA/Gr have been examined and consistent differences between the strains have been noted and described. Some of these are presence/absence differences, others are variations in size and/or shape of localized portions of particular bones. A positional difference of the ilium in relation to the ischio-pubis has been observed in the pelvis. Finally there are general differences in size, C57 BL skeletons being on the whole the largest and heaviest of the three strains. Preliminary observations indicate that the presence/absence variants are probably not dependent on single gene differences between the strains. No genetic analysis of the other types of variation has been attempted, but the consistency with which they occur indicates that they are genetically determined.
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Stein, K.F. Genetical studies on the skeleton of the mouse XXI. The girdles and the long limb bones. J Genet 55, 313–324 (1957). https://doi.org/10.1007/BF02981646
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DOI: https://doi.org/10.1007/BF02981646