Practice question

A gene is defined as a functional segment of genetic material, DNA in most organisms or RNA in some viruses, carrying information for a product or regulatory role influencing phenotype. It encompasses protein-coding open reading frames, RNAs like tRNA and rRNA and essential cis regulatory elements controlling transcription. Modern cistron concept views gene as unit of function, mutation and complementation. Isolated protein, whole chromosome or trait alone are incomplete descriptors, functional segment captures hereditary, biochemical and evolutionary significance across linkage and molecular biology. This principle is routinely tested in NEET, CBSE 11-12, CUET, CSIR-NET, GATE