Describes a number of different processes that can be used to produce genetically identical copies of a biological entity.

• A. Genetic engineering
• B. Epigenetics
• C. Recombinant DNA
• D. Cloning

Answer: (D)

The idea being tested is making genetically identical copies of a biological entity. Cloning achieves this by creating organisms or cells that share the same DNA as the source, producing near-identical genetic material through methods like somatic cell nuclear transfer.

Genetic engineering, by contrast, involves altering genes to create new traits, not simply copying the entire genome. Recombinant DNA is a technique used within genetic engineering to assemble DNA pieces from different sources, not to produce an exact genomic copy of the original. Epigenetics focuses on heritable changes in gene expression that occur without changing the DNA sequence, so the DNA can be the same but expression patterns differ, leading to potential phenotypic differences.