Cistron and Mutant 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.

Mutant gene and cistron are semantically related. In some cases you can replace phrase "Mutant gene" with "Cistron", this terms are similar.

Mutant gene noun - A gene that has changed so that the normal transmission and expression of a trait is affected.

Cistron and mutant gene are semantically related. You can use "Cistron" instead a noun phrase "Mutant gene".