Zoë stepped back from the computer monitor. “Lorna, you have to see this.”
Lorna moved closer and recognized a karyogram on the screen. It showed a set of numbered chromosomes lined up into a chart.
Karyograms were built by using a chemical to trap cell division in its metaphase stage. The chromosomes were then separated, dyed, and sequenced via digital imaging into a numbered karyogram. Humans carried forty-six chromosomes, divided into twenty-three pairs. The monitor showed twenty-eight pairs.
Definitely not human.
Carlton explained, “We built this karyogram from a white blood cell from one of the capuchin monkeys.”
From the general excitement, Lorna knew there remained another shoe to drop.
Paul spoke up, his voice was full of wonder. “Capuchins normally have a complement of twenty-seven pairs of chromosomes.”
Lorna stared at the karyogram on the screen. “But there’s twenty-eight here.”
“Exactly!” Zoë said.
Lorna turned to the facility’s director. “ Carlton, you said you still wanted to repeat the test. Surely this is a lab error.”
“It’s under way, but I suspect we’ll confirm the original findings here.” He nodded to the computer.
“Why’s that?”
Carlton leaned forward, grabbed the computer mouse, and toggled through another five genetic maps. “This next karyogram is from the conjoined twin of the first monkey. Again twenty-eight chromosomal pairs. Same as the first. The next studies are from the lamb, the jaguar cub, the parrot, and this last is from the Burmese python.”
The python?
Frowning, she glanced across the lab to where an incubator housed the clutch of snake eggs. In his desire to confirm what she was beginning to suspect, Carlton must have opened one of the eggs to get at the developing embryo inside and obtain its DNA sample.
“Pythons typically have thirty-six pairs of chromosomes,” Carlton continued. “A mix of micro- and macro-chromosomes.”
Lorna read off the screen. “There are thirty-seven here.”
“That’s right. One pair more than normal. Like all the rest. That’s why I’m sure we’ll get the same results when we run the genetic studies again. It’s beyond statistical probability that the lab came up with the same error six times in a row.”
Lorna’s mind reeled as she struggled to come to grips with what this implied. “Are you saying that each of the animals from the trawler is showing the same genetic defect? That each is carrying an extra set of chromosomes?”
Such genetic abnormalities occasionally occurred in humans. A single extra chromosome caused a child to be born with Down syndrome. Or there was Klinefelter’s syndrome, where a male was born with two X chromosomes, forming an XXY karyotype. And in rare instances, some people were born with an extra pair of chromosomes. Abnormalities this severe usually resulted in early death or severe mental retardation.
She frowned at the screen. None of her animals exhibited such debilitation. The confusion must have been plain on her face.
“I don’t think you’re understanding the full thrust of what we’re saying,” Carlton said. “This extra pair of chromosomes isn’t the result of a genetic error. It didn’t come about from a random mistake in cell division in a sperm or egg.”
“How can you be so sure?”
Carlton manipulated the mouse and flipped through the six karyograms again. He pointed to the last chromosome pair on each of the studies.
“The specimens from the trawler aren’t just carrying an extra set of chromosomes,” the director continued. “They’re carrying the same ones.”
Only now did Lorna recognize that the extra pair of chromosomes in each of the species looked identical. As the implication sank in, understanding began to slowly well up. It felt like a tide shifting the foundation under her.
Impossible.
Carlton poked at the computer screen. “That is not an error of nature. That’s the hand of man. Someone put that extra pair of chromosomes in all these animals.”
“Who…?” Lorna mumbled out, unbalanced to the point of feeling dizzy, but also oddly excited by it all.
Carlton turned to her, his bushy gray eyebrows resting high on his forehead. His wide eyes shone with raw curiosity. “The bigger question, my dear, is why.”
Chapter 9
Deep in the bayou, Danny Hemple’s father waded through the reeds. “You’re trying my last nerve, boy. Sometimes you’re as useless as tits on a bull.”
Danny didn’t argue. He knew better. At seventeen, he was nearly as big as his father, but not even half as mean. He’d once watched his dad beat a man bloody with the handle of a hammer, payback for shortchanging him on his share of a fishing haul.
At the moment Danny watched his father drag a crab trap out of the muddy reeds. It didn’t belong to them. And it wasn’t some old barnacle-encrusted trap that had been long abandoned. It looked brand-spanking-new with a fresh line, buoy, and legal tag still attached.
His father used a pocketknife to cut the line and tag away. He slogged through the reeds with his prize. Danny spotted a dozen or so good-size Louisiana blue crabs scuttling within the stolen trap.
“Boy, get your thumb out of your ass and move the damned boat closer. We don’t have all day.”
His father wore waders held up by suspenders as he worked through the shallows. Danny poled the boat closer to him. It was a half-rusted airboat that’d had its fan removed and replaced with an old outboard Evinrude. This close to the muddy bank it was too shallow to use the engine-and it would be too noisy anyway. What they were doing could get them in big trouble with the state wildlife guys.
Storms like the one last night wreaked havoc on the thousands of crab traps staked along the waterways near the Gulf. Surges ripped them from their moorings and cast them deeper into the surrounding swamps.
Like throwing out free money, his father had often quipped.
Danny had joked with his friends that it was more like casting pearls before swine. He had made the mistake of repeating that joke within earshot of his father. Danny’s nose still had a knot from that old break.
“Come get this already! There’s at least two more.”
Oink, oink, Danny thought sourly to himself and poled forward.
Once close enough, he took the trap from his father’s arms and added it to the four already stacked in the boat. It was good haul, and as much as he might despise what they were doing, he understood why. At eight dollars a pound for claw meat and twice that for jumbo lump, they might clear close to a grand for the afternoon’s work. Not to mention reselling the crab traps back to the same people who once owned them.