Abstract
THE North American bark weevil, Pissodes approximatus Hopk., has three different chromosome numbers, namely, 30, 31 and 32, due to what White1 has called ‘centric fusion’ of non-homologous autosomes. The ‘fusion’ homozygote consequently has two large V-shaped chromosomes instead of four smaller rod-shaped chromosomes, and the ‘fusion’ heterozygote has one V and two rods that form a trivalent in primary spermatocytes (Fig. 1).
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White, M. J. D., “Animal Cytology and Evolution” (Camb. Univ. Press, 1954).
White, M. J. D., “Advances in Genetics”, 4, 267 (1951).
Smith, S. G., Heredity, 7, 31 (1953).
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SMITH, S. Chromosomal Polymorphism in a Bark Weevil. Nature 177, 386 (1956). https://doi.org/10.1038/177386a0
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DOI: https://doi.org/10.1038/177386a0
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