The most basic level of transformation was of course on the genetic level. Genetic Inc. had begun as an organization offering genetic resequencing to people suffering from hereditary conditions and transgender people, so this technology was something they had been refining and perfecting for over a century. Resequencing for "chimeras"--the generic term for non-natural genotypes and phenotypes--presented unique challenges, but nothing insurmountable.
The computer performed a quick genetic sequencing of Ashley's DNA and found nothing that presented a problem. Sex-linked hereditary conditions had been eliminated from humanity in the 2100s, so replacing an X with a Y was not going to trigger any nasty surprises. A specially cultivated virus was introduced in billions of copies into Ashley's bloodstream, where it spread to all parts of her body, flipping her chromosonal structure from that of a female human to that of a male minotaur. The virus worked fast, completing its task in less than twelve hours. Nutrients introduced through a tube into the mouth fueled the process while introducing male hormones to begin the alteration of Ashley's hormonal balance. Still unconscious and unaware, Ashley was allowed twelve hours to recuperate and for a series of scans to ensure that the process had not introduced any unwanted side effects. Her outward appearance was unchanged, but her genetic information was completely different.
That went well, thought Dr. Susan Erlanger, the expert overseeing Ashley's transformation, but she knew that day two would tell the real story as organ rearrangement began. As she often did under moments of stress, she rubbed the goat fleece that covered her lower body from her waist to her hooves.