Abstract
ONE of the more intensively studied phenomena used in investigating the control of gene activity in higher organisms is the “puffing” of the polytene chromosomes of Diptera, a phenomenon which has been shown to be an expression of gene activity1. The changing pattern of puffs during larval and prepupal development in Chironomus and Drosophila is influenced, to a certain extent, by the hormone ecdysone2,3. There is evidence that the effect of this hormone is indirect, acting by way of a control of the ionic composition of the cell and nuclear sap4–6.
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ASHBURNER, M. Gene Activity dependent on Chromosome Synapsis in the Polytene Chromosomes of Drosophila melanogaster. Nature 214, 1159–1160 (1967). https://doi.org/10.1038/2141159b0
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DOI: https://doi.org/10.1038/2141159b0
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