Human Genetics Lab Manual -

The manual sat open to the troubleshooting page. “Common errors: Contamination, degraded primers, or unexpected mutations.”

To most students, it was a dry collection of protocols for PCR and gel electrophoresis. To Elias, it was a map. He had spent months following its instructions, not to pass a class, but to solve a mystery hidden in his own blood. Human Genetics Lab Manual

The fluorescent lights of the Advanced Genomics wing flickered, casting a sterile glow over Elias as he stared at the red-bound book on his bench: The Human Genetics Lab Manual, 4th Edition. The manual sat open to the troubleshooting page

He flipped to Chapter 8: Identifying Polymorphisms . He’d spent the last six hours isolating his own DNA, a process the manual described as "routine." But as the centrifuge whirred to a stop, his hands shook. He loaded the tiny plastic wells of the sequencing plate, his eyes burning from lack of sleep. He had spent months following its instructions, not

As the computer began to map the base pairs—A, T, C, G—the screen didn’t show the standard sequence for the HTT gene. Instead, a jagged spike appeared where there should have been a smooth line. A sequence that didn't match the human reference genome. A sequence that, according to the manual's appendix on "Rare Variants," shouldn't exist in any known database.

Elias looked from the screen back to the manual. On the inside cover, a handwritten note from the previous owner—a professor who had vanished three years prior—read: The manual tells you how it works. The data tells you what you are.