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Genetic Engineering & Application (10BT-55) Lecture Notes Unit-01: Introduction to Genetic Engg UNIT 1: INTRODUCTION Extrachromosomal elements, Construction of recombinant DNA molecules, vectors in rDNA technology, salient features of vectors, types of vectors-plasmids, cosmids, phagemids and viruses. Construction of vectors (BAC, Blue script and YAC) 06 Hours Extra chromosomal elements OR Plasmid:  Plasmids are naturally occurring extra chromosomal double-stranded circular DNA molecules which can autonomously rep