What is a pseudogene?
This outcome reflects metabolic engineering and inheritance, where exogenous gene introduction and pathway extension enable trait improvement. Option D captures this correctly because it demonstrates metabolic extension and combinatorial biosynthesis, consistent with textbook descriptions and experimental observations in genetics and biotechnology.
Ref: Griffiths et al., Introduction to Genetic Analysis, 11th Edition, Chapter 5, discusses metabolic pathways, recombinant DNA technology, metabolic extension and Golden Rice as pathway engineering for vitamin A production.
