What are the relation between nucleous and nuclear organizer region?
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A clear relationship between nucleolus and some chromosomal regions was first established by Heitz (1931). This author demonstrated the involvement of these chromosomal regions in the telophase reconstitution of the nucleoli. McClintock (1934) called these regions “nucleolus organizing regions” (NORs), a term indicating that the nucleoli originate in these regions.
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