Radzhabli S I, Isaenko A A, Volobuev V T
Genetika. 1978 Mar;14(3):438-43.
Comparison of chromosome number at somatic and spermatogonial mitoses has demonstrated the increase in the number of additional chromosomes in cells of germinal tissue. This may evidence a mechanism of B-chromosomes accumulation in foxes. B-chromosomes may lag as univalents, may form bivalent associations, or occasionally form trivalents at the stage of diakinesis-metaphase I, and they may associate with macrobivalents (A-chromosome bivalents). The analysis of metaphase II has shown that the distribution of B-chromosomes in the second metaphase is random resulting in gametes with various numbers of B-chromosomes.
体细胞有丝分裂和精原细胞有丝分裂时染色体数目的比较表明，生殖组织细胞中额外染色体的数量有所增加。这可能证明了狐狸中B染色体积累的一种机制。在终变期 - 中期I阶段，B染色体可能以单价体形式滞后，可能形成二价体联会，或偶尔形成三价体，并且它们可能与大的二价体（A染色体二价体）联会。中期II的分析表明，B染色体在第二次中期的分布是随机的，导致配子中B染色体的数量各不相同。
