Abstract

Data on centromere locations from 168 fully identified normal human complements were subjected to special analyses of variance by computer. Aggregation specifically attributable to homologue associations seemed definitely to be absent. Chromosomes 1, 9 and 16, which contain large heterochromatic blocks were distributed as typical non-acrocentrics. X chromosomes in female cells behaved much like other chromosomes of their size, but may have an atypically large homologue distance. Acrocentrics aggregate as a group without specific homologue associations; smaller chromosomes in the group are often nearer the center of the metaphase plate. The data do not suggest stronger acrocentric association in females than males.

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