Chromosomal Aberrations in a Population of Ground Squirrels

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Science  04 Feb 1966:
Vol. 151, Issue 3710, pp. 579-580
DOI: 10.1126/science.151.3710.579


Chromosomes were analyzed from a population of Spermophilus beldingi that included an adult female and three juveniles from the same burrow. All animals had a diploid number of 30. The adult and a juvenile female from the burrow had identical aberrant karyotypes containing an unpaired submetacentric and a minute metacentric chromosome. A familial aberration involving an X chromosome, without phenotypic alteration, is most probable.