Abstract
A portion of the X chromosome was examined for puffing activity shortly before puparium formation in several species of Hawaiian Drosophila. A large puff was induced by incubating excised salivary glands with β ecdysone. In two of the seven species studied, the region in question has been moved by inversion to a new position relative to the banding sequence in the other species, but the reaction to β ecdysone remained unchanged. Another puff, not affected by short term incubations with β ecdysone, displayed different degrees of activity in some homosequential species, affording a cytological means for distinguishing these species.
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Raikow, R.B. Puffing in salivary gland chromosomes of picture-winged Hawaiian Drosophila . Chromosoma 41, 221–230 (1973). https://doi.org/10.1007/BF00319697
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DOI: https://doi.org/10.1007/BF00319697