Abstract
THE relationship between the length of the chromosomes and the frequency with which they form chiasmata at meiosis is well known and has been analysed extensively by Darlington1, Mather2 and others. In general, it is found that long chromosomes form more chiasmata than short chromosomes in the same nucleus. The chiasma frequency, however, is not always found to be directly proportional to length, that is, the potential for forming chiasmata varies between chromosomes to some degree independently of their length. The details of such variation could be investigated in most favourable circumstances during observations made in Locusta migratoria. These are briefly described below.
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References
Darlington, C. D., “Recent Advances in Cytology” (London, 1937).
Mather, K., Biol. Rev., 13, 252 (1938).
Mather, K., J. Genet., 29, 205 (1940).
Rees, H., and Jamieson, A., Nature, 173, 43 (1954).
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REES, H. Distribution of Chiasmata in an ‘Asynaptic’ Locust. Nature 180, 559 (1957). https://doi.org/10.1038/180559a0
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DOI: https://doi.org/10.1038/180559a0
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