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gene
 
Definition:
Biology Glossary search by EverythingBio.com
 
     
  Structurally, a basic unit of hereditary material; an ordered sequence of nucleotide bases that encodes a product (this product could be just RNA like rRNA or finally coding for a protein). The gene includes, however, regions preceding and following the coding region (5' UTR and 3' UTR) as well as (in eukaryotes) intervening sequences (introns) between individual coding segments (exons).
There are many discussions between biologists to find a comprehensive definition of a gene, which is not easy, if possible at all.
See also cistron; locus; Mendel's first law.
 
     


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