Differential elongation of autosomal pachytene bivalents related to their DNA content in human spermatocytes

1 September 1988

journal article
research article
Published by Springer Nature in Chromosoma

Vol. 97 (1) , 19-25
https://doi.org/10.1007/bf00331791

Abstract

The establishment of the complete karyotype of human pachytene spermatocytes reveals differences in stretching of chromosomes between meiosis and mitosis. Bivalents or specific regions of bivalents which exhibit many R-bands are particularly elongated. In mitotic chromosomes, the DNA contained in such bands is known to be early replicating. The study of variations in the total length and the centromeric index of bivalent 1 suggests that differential elongation of pachytene bivalents is a premeiotic event, taking place during the last DNA replication.

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