Abstract
RECENT studies on wild populations of Drosophila are shedding considerable light on the effects of natural selection. By means of the cytological examination of salivary gland chromosomes, it is possible to analyse the nuclear constitution more precisely than in other living forms. For example, an inversion of part of a chromosome abcde to form a different chromosome adcbe is not infrequent, and may be quickly detected in the hybrid between two Drosophila containing these respective chromosomes. Generally there is no apparent difference in the characters of the individuals carrying normal or inverted chromosome arrangements. Occasionally, however, a large position effect is noted such as in ‘roughoid' (Gruneberg, 1939).
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References
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Berrie, G. K., and Sansome, F. W. (in the press).
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SANSOME, F. Natural Selection of Drosophila. Nature 161, 409 (1948). https://doi.org/10.1038/161409a0
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DOI: https://doi.org/10.1038/161409a0