du·pli·ca·tion 
(d′plĭ-kāshən, dy′-)
(d′plĭ-kāshən, dy′-)n.
1.
a. The act or procedure of duplicating.
b. The condition of being duplicated.
2. A duplicate; a replica.
3. Genetics
a. The occurrence of a repeated section of genetic material in a chromosome.
b. The formation of such a duplication.