What are genes from the point of view of a biochemist?

From the point of view of a biochemist, a gene is a part of a DNA molecule that contains information about the structure of a particular protein (either rRNA or tRNA). Genes are located on the chromosomes.
During the implementation of the hereditary information contained in the genes, the corresponding proteins are synthesized. Each protein performs a specific function, which leads to the manifestation of a particular sign of the body. This relationship can be reflected in the following scheme: gene → protein → trait.

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