IUPAC definition : Structurally, a basic unit of hereditary material; an ordered sequence of nucleotide
bases that encodes one polypeptide chain (via mRNA). The gene includes, however, regions
preceding and following the coding region (leader and trailer) as well as (in eukaryotes)
intervening sequences (introns) between individual coding segments (exons). Functionally,
the gene is defined by the i cis-trans /i test that determines whether independent
mutations of the same phenotype occur within a single gene or in several genes involved
in the same function.;
Structurally, a basic unit of hereditary material; an ordered sequence of nucleotide
bases that encodes one polypeptide chain (via mRNA). The gene includes, however, regions
preceding and following the coding region (leader and trailer) as well as (in eukaryotes)
intervening sequences (introns) between individual coding segments (exons). Functionally,
the gene is defined by the i cis-trans /i test that determines whether independent
mutations of the same phenotype occur within a single gene or in several genes involved
in the same function.