The doctor adjusted the glasses on the bridge of his nose and said with utmost precision, "Medically speaking, only a 99.9999% match can completely confirm a father-son relationship."
Cheng Haoming felt as if he had been struck by lightning. "You mean... the child isn't mine?"
"Impossible!"
Madam Cheng immediately refuted him.
"The child's DNA is so similar to my son's—it's reached 95%! How could they not be related?"
"Besides, that child was conceived right under my nose. I watched my daughter-in-law's belly grow bigger with my own eyes. How could he not be my grandson?"
"You must have made a mistake. Think it over carefully and run the test again."
The doctor had seen plenty of situations like this. Without changing expression, he advised, "Madam, please be quiet and let me finish."
"When we test DNA, what matters most is comparing the loci in their arrangements. Generally, only when all twenty-one loci are identical can we completely confirm a father-son relationship. But between your son and your grandson, only twenty loci match. One is different. Therefore, we can't confirm that they are biological father and son."
"What do you mean, one is different? It's only one! Maybe it's some kind of genetic mutation. How can you say they aren't father and son?"
Madam Cheng felt that this doctor was completely inventing trouble out of thin air.
The doctor nodded, taking it as an acknowledgment of part of her point.
"We can't rule out a genetic mutation from the mother's side."
"So my recommendation is, if you insist on getting to the bottom of this, please provide a sample from the child's mother."
Madam Cheng snorted. "Then we'll go back and get one now."
She refused to believe it. The child had been conceived right under her nose—how could there be