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A gene occupies a fixed position on a strand of DNA, this is called a locus.
Genes: sections of DNA that contain coded information due to specific bases.
Genes code for polypeptides and determine the nature and development of an organism
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The base sequence of genes can change due a mutation- this causes an allel
A sequence of 3 gene bases (triplet code) codes for a specific amino acidAmino acids make up polypeptides
Eukaryotes:A lot of DNA doesnt code for anything.these are called introns.Differences in genes and alleles might result in non-functional proteins/ enzymes.
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