Ecosystem diversity, the diversity of a place at the level of ecosystems. Crop diversity, the variance in genetic and phenotypic characteristics of plants used in agriculture. Functional diversity (ecology), the elements of biodiversity that influence how ecosystems function; see diversity-function debate.
Gene therapy is the therapeutic delivery of nucleic acid polymers into a patient's cells as a drug to treat disease. Until September 1990, it had never been successfully done, and it is still an experimental and emerging medical technology.
Gene. The term  gene  refers to a functional segment of DNA, which in eukaryotic cell s would be a part of a chromosome in the nucleus of the cell. Gene duplication occurs when an error in DNA replication leads to the duplication of a region of DNA containing a (generally functional) gene.ene therapy. From Wikipedia, the free encyclopedia. Gene therapy is the use of DNA as a pharmaceutical agent to treat disease. It derives its name from the idea that DNA can be used to supplement or alter genes within an individual's cells as a therapy to treat disease.