Reverse phasing

Reverse phasing is a process invented by Kevin Borland in 2013, by which the DNA of a subject donor is phased using a child rather than a parent.

The workflow consists two steps, first performing phasing to create in-phase and evil twin kits for the parent/child pair, and then realigning the blocks of shared DNA on those kits based on whether the blocks contain paternal or maternal DNA data, using a series of logic rules. In the Borland Genetics Web Tools and Database, these tasks can be managed via a private project with guidance from the site's automated assistant, the Creeper. Both the web tools and Borland Genetic's earlier Desktop Toolkit also allow users to manually perform the process using chromosome maps rendered via DNA Painter.