Disproval of an apparent goat x sheep hybrid

Samples of whole blood of a Boergoat buck (60,XY), and ewe (54,XX) and her heterosexual twins were cytogenetically examined. The female offspring had hair and seemed to be a cross between the two animals. However, both twins possessed 54 chromosomes, including 6 large submetacentric autosomes, whose R- and G-banding patterns were identical to those of the ewe.