Ross D S, Thomas W J
Anim Blood Groups Biochem Genet. 1978;9(1):3-8. doi: 10.1111/j.1365-2052.1978.tb01404.x.
A study was made of the progeny of a pair of dizygotic twin bulls whose blood group phenotypes were identical but were genotypically different, indicating a complete replacement of one of the bulls haematopoietic tissus by that of its cotwin. The study was made in an attempt to determine whether the genes of one sibling were transmitted by the other. It it were so it would follow that the germ cells of the testes were chimaeric. Blood typing of 97 progeny provided no evidence to indicate the presence of such a germ cell chimaerism.
对一对血型表型相同但基因型不同的异卵双生公牛的后代进行了研究，这表明其中一头公牛的造血组织被其孪生兄弟的造血组织完全替代。进行这项研究是为了确定一个同胞的基因是否会被另一个同胞传递。如果是这样的话，那么睾丸的生殖细胞就是嵌合体。对97头后代的血型鉴定没有提供证据表明存在这种生殖细胞嵌合现象。
