Non-conditional, negative selection marker genes are usually expressed under a
Mechanistically, metabolic engineering and inheritance involves exogenous gene introduction and pathway extension enable trait improvement. This validates developmentally regulated promoter because it demonstrates metabolic extension and combinatorial biosynthesis, a pattern repeatedly demonstrated in genetics and biotechnology research.
Ref: Pierce, Genetics: A Conceptual Approach, 6th Edition, Chapter 3, discusses genotype-phenotype correlation and inheritance patterns providing framework for genetic transmission and metabolic engineering.
