Primary and secondary constrictions of a chromosome
Define the primary and secondary constrictions of a chromosome? Write the other name provided to the secondary constriction?
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Primary constriction is the narrower area of a condensed chromosome where the centromere, the structure which unites similar chromatids, is situated. Secondary constriction is an area identical to the primary constriction, narrower than the normal thickness of the chromosome as well, and in common it is associated to genes which coordinate the formation of the nucleolus and control the ribosomic RNA (or rRNA) synthesis. For this cause the secondary contrictions (which can be one or more in chromosome) is termed as nucleolus organizer region (or NOR).
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For this assignment you will have to make use of information and skills gained throughout the 4 weeks of the introductory programme. This may be understanding of genes & their products, how to find and reference information from different sources, and specifically
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