Cytogenetical studies on the Japanese raccoon dog. IX. Behavior of B-chromosomes in the first meiotic division in the male germ cells.:Behavior of B-Chromosomes in the First Meiotic Division in the Male Germ Cells
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The behavior of the B-chromosomes in the first spermatocytes of two Japanese raccoon dogs, which are observed previously in the spermatogonial cells, is described in the present paper. The B's in the most first spermatocytes are conjugated end-to-end, but some ones remained as the univalent condition. Thus, most of the first spermatocytes have at least one bivalent or trivalent of B's.
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