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Some Similarities of Monozygotic Cattle Noseprints¹

Agricultural Experiment Station, Brookings, South Dakota

ABSTRACT

Although such similarities as height, weight, spots, location of hair whorls, length of tail and general appearance have all been considered as indications of monozygosity, no criterion has been formulated to positively establish identity. Gilmore (1) has suggested that noseprints from identical animals are similar; therefore, this characteristic may be used as an indication of monozygosity. Since Petersen (3) has established that noseprints may be used as positive proof of identification, Hirsch et al. (2) have formulated a classification for rapid identification of the print. This classification is based on certain muzzle configurations resulting from rows of sweat glands. Inasmuch as the general characteristics are similar, it seems reasonable to assume that certain similar muzzle configurations might be an indication of monozygosity. This paper deals with some of the classified similarities and differences between animals considered monozygotic.

¹ Approved for publication by the Director of the South Dakota Experiment Station as Journal Series No. 284.