This list of unsolved deaths includes notable cases where victims have been murdered or have died under unsolved circumstances, including murders committed by unknown serial killers. The mysteriously-deceased are listed chronologically by year.
Genetic engineering, also called genetic modification, is the direct manipulation of an organism's genome using biotechnology.
The genetic engineering process. 1  A small piece of circular DNA called a plasmid is extracted from the bacteria or yeast cell. 2  A small section is then cut out of the circular plasmid by restriction enzymes, âmolecular scissorsâ.  The gene for human insulin is inserted into the gap in the plasmid.