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fundamental unit of heredity
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The '''gene''' is the fundamental unit of [[heredity]].
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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.  
 
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.
      
==History==
 
==History==
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