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A gene (def) is a segment of DNA that codes for a functional product (mRNA, tRNA, or rRNA). Since the vast majority of genes are transcribed into mRNA and mRNA is subsequently translated into polypeptides or proteins, most genes code for protein synthesis. gene (def) is a segment of DNA that codes for a functional product (mRNA, tRNA, or rRNA). Since the vast majority of genes are transcribed into mRNA and mRNA is subsequently translated into polypeptides or proteins, most genes code for protein synthesis.
DNA transcription is the process of copying a DNA template onto a messenger RNA. This mRNA is then translated into an amino acid sequence (polypeptide/protein). DNA replicatio â¦ n is the copying of DNA to make more copies of DNA.NA transcription is the process of copying a DNA template onto a messenger RNA. This mRNA is then translated into an amino acid sequence (polypeptide/protein). DNA replicatio â¦ n is the copying of DNA to make more copies of DNA.