DNA analysis, which has proven to be a major advance in the field of paternity testing, involves the direct examination of the genetic material that a child inherited from its biological parents. DNA is located throughout the human body and in the same identical form.
In a plant with a taproot system, the taproot is the largest, most central, and most dominant root from which other roots sprout laterally. Typically a taproot is somewhat straight and very thick, is tapering in shape, and grows directly downward.
In order to enhance the development of more lateral roots in taprooted plants, pruning of the taproot is practiced, as in plant nurseries. The practice is also a standard procedure with bonsai trees. The primary root which develops from a radicle and becomes dominant is called a taproot, as in carrot.