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    Cytogenetics of B-Chromosomes

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    SUMMARYThe author intends to give this as a contribution in the discussion relating to a non-homogeneous group of chromosomes, variously known as accessory, B, extra or supernumerary. The term B-chromosome is considered the most appropriate. Moreover, the author discusses the terminology, the presence of B-chromosomes in animals and plants, and their principal cytogenetic characteristics
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