D. Using a molecular biology based approach; foreign pieces ofDNA can be readily integrated into the nuclear genomes of a numberof plant species via the use of the Agrobacterium tumefaciens(Agrobacterium) Tumour-inducing (Ti) plasmid and its encodedTransfer-DNA (T-DNA). For the Agrobacterium Ti plasmid and T-DNA tobe used successfully for the introduction of foreign DNA to theplant nuclear genome, some gene sequences need to be retained whileothers must be removed. Please state; (1) which gene sequences areretained and which are removed; (2) the position (Ti plasmid-basedor T-DNA-based) of the retained and removed sequences, and; (3)explain why some gene sequences must be retained while othersrequire removal.
