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{{stub}}A section of [[DNA]] that codes for the production of a [[protein]] or a portion of a protein. The gene is the fundamental unit of heredity.  
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{{stub}}A section of [[DNA]] that codes for the production of an [[RNA]] molecule.  In most cases that RNA molecule codes for the production of a [[protein]], but in some cases (most notably the transfer RNA ([[tRNA]]) and ribosomal RNA ([[rRNA]]) genes) the RNA molecule is the end product.  
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The gene is the fundamental unit of heredity.  
    
==References==
 
==References==
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