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. 1956 Jul 25;2(4):403-6.
doi: 10.1083/jcb.2.4.403.

The fine structure of chromosomes in the meiotic prophase of vertebrate spermatocytes

D W FAWCETT

The fine structure of chromosomes in the meiotic prophase of vertebrate spermatocytes

D W FAWCETT. J Biophys Biochem Cytol. .

Abstract

The prophase chromosomes of the first meiotic division in pigeon, cat, and man contain a central structure or core consisting of a pair of dense fibrils (450 A) that are parallel to one another and equidistant from a delicate linear region of increased density midway between them. These parallel strands are present early in prophase and the chromosomes seem to arise by congregation and organization of the chromatin granules around them. They have not been observed in mitosis or in other stages of meiosis.

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