Genotypic Control of Chromosome Size

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THE differences in size between the chromosomes of related species are usually differences that can be attributed to structural changes such as fusion, fragmentation, etc. In many groups, however, enormous differences of size are found, which may be of the order of 1: 100 or even 1: 1,000. Such differences, uniformly affecting as they often do the whole complement, must be due to a unitary genotypic control of chromosome size. In other words, the size of chromosomes, like other properties of the organism, must be subordinate to the action of the genes they carry1.

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    Darlington, Amer. Nat., 66, 25 (1932).

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    Darlington, J. Genet., 21, 207 (1929).

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    Jenkin, Welsh Plant Breeding Station Bull., H. 12 (1931).

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    Jenkin, J. Genet., 28, 205 (1934).

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    Upcott, J. Genet., (in the press).

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THOMAS, P. Genotypic Control of Chromosome Size. Nature 138, 402 (1936) doi:10.1038/138402a0

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