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Transcript
Genetic selection and variation Genes Genes are a specific sequences of DNA located on the chromosomes. Chromosomes consist of proteins (histones) combined with two complementary chains of DNA. Two chromosome strands are arranged in a spiral known as the double helix. Back to main genetic selection menu Next Back to main selection menu Genetic selection and variation Genes A gene can be described as a linear piece of DNA that includes a regulatory sequence that determines when the gene will be transcribed: An initiation sequence; Exons that are the coding region; Introns that are non coding regions and are spliced out of the gene during transcription; And a termination sequence. (see Chapter 2). Back to main genetic selection menu Back Back to main selection menu
