Cistron and Operator gene

Cistron noun - (genetics) a segment of DNA that is involved in producing a polypeptide chain; it can include regions preceding and following the coding DNA as well as introns between the exons; it is considered a unit of heredity.

Operator gene and cistron are semantically related in gene that makes repressor topic. In some cases you can use "Operator gene" instead a noun "Cistron".

Operator gene noun - A gene that activates the production of messenger RNA by adjacent structural genes.

Cistron and operator gene are semantically related in gene that makes repressor topic. You can use "Cistron" instead a noun phrase "Operator gene".