Gene and cistron are sometimes used synonymously because:
Correct answer: C. One gene contains one cistron
- A. One cistron contains many genes
- B. One gene contains many cistrons
- C. One gene contains one cistron
- D. One gene contains no cistron
Explanation
A gene is a hereditary unit consisting of a sequence of DNA and occupying a specific position or locus within the genome. Gene activity ultimately affects the phenotype of the organism possessing the gene. Thus gene is a physical and functional unit of genetic information. A cistron is a unit of genetic function. In prokaryotes, there is a one gene-one enzyme correspondence. It means that in these organisms, genes and cistrons are equivalent.
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About Chromosomes
Chromosomes are DNA-protein structures that carry genes and become visible during cell division. Coverage includes chromatin, centromeres, sister chromatids, homologous chromosomes, chromosome number, and the distinction between diploid and haploid cells, with links to DNA replication, mitosis and meiosis.
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