Articles > Gene definition – quiz Gene definition – quiz Quiz Choose the best answer. 1. The fundamental, physical, and functional unit of heredity Genotype Gene Chromosome None 2. A gene is made up of ... nucleic acids nucleotides chromosomes None 3. The complete set of genetic material in an organism Genome Allele Gene None 4. Gene variants Genome Allele Genotype None 5. Gene expression Transcription Translation Transcription and translation None Send Your Results (Optional) Your Name To Email Time's up