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Heterochrony in cotton bollworm, Earias vitella (Fb) following ethoxyprecocene administration

Irfan Ahmad Khan1, Krishna Kumar

  • 1Department of Zoology, University of Allahabad, Allahabad 211 002, India.

Indian Journal of Experimental Biology
|July 17, 2004
PubMed

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In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.