Drama Queen Reborn as a Top Student!-Chapter 998 - 498: Discovery of the Secret—They Are Actually Mother and Son (3)

Shen You’an calmly and rationally analyzed one by one: "When they smile, the slight indentation in a specific position on one side of their cheeks, almost imperceptible, even the depth is consistent. This subtle mutation of muscle attachment points is also inheritable."

In her mind, Shen You’an recalled the contour information of Gu Bichen: "But Gu Bichen’s ear is the common oval shape, his iris texture is uniform and unremarkable, and his facial muscle movement pattern when smiling is completely different. From dominant genetic traits, Gu Bichen’s similarity to Professor Na is far lower than expected from a random passerby, which is extremely abnormal."

"Moreover, Rong Xianning and Professor Na both don’t consume scallions, ginger, or garlic, a sensitivity caused by certain genes affecting taste receptors."

Shen You’an didn’t notice the intense turmoil in the eyes of the young man beside her. She continued analyzing as she walked: "Professor Na and Rong Xianning’s eyebrow arch height, the angle between the nose bridge and the upper lip, and the depth of the philtrum fall within the same narrow statistical range. The probability of this combination occurring in the Jingzhou population is less than 0.1%." 𝑓𝑟ℯ𝘦𝓌𝘦𝘣𝑛𝑜𝓋𝑒𝓁.𝑐ℴ𝓂

In her mind, Shen You’an went through repeated 3D comparisons of the two skulls, "More crucially, the relative position and the angles of the zygomatic and jawline under the cheekbones show a highly similar foundational structure. This is a complex trait regulated by numerous genes, making it almost impossible for such similarity to occur without a blood relationship."

"In contrast, Gu Bichen’s facial feature parameters are based on a generic model, and his alignment with Professor Na’s key parameters is less than 50%, completely within the range of randomness."

Shen You’an suddenly stopped, eyes wide open, a storm brewing in her gaze.

"From a biostatistical standpoint, the probability of Rong Xianning being Professor Na’s biological son is several orders of magnitude higher than that of Gu Bichen being Professor Na’s biological son. The current situation defies basic laws of genetics and probability theory."

The night breeze blew quietly, with the moonlight reflecting on the river’s surface, casting jagged ripples, shrouding everything in silence.

Shen You’an turned to look at Liu Runxi.

Liu Runxi’s pupils shook. Rationally, he told himself that Shen You’an’s analysis was based on observations and theory, her logic rigorous, and she referenced basic genetic concepts.

But...

"This is too far-fetched, impossible..."

Shen You’an looked directly into Liu Runxi’s eyes: "We both must adhere to science. Genetics avoids focusing on a single trait, emphasizing the high consistency of a series of traits. A single trait might be a coincidence, but the probability of multiple rare traits overlapping is extremely low. You’re so proficient in biomedical science, don’t tell me you’ve forgotten such simple genetic principles."

Liu Runxi gradually calmed down: "The probability you’ve calculated for the simultaneous ’coincidental’ match of multiple traits is indeed unimaginably low. But returning to reality, Gu Bichen is not Professor Na’s biological son, whereas Rong Xianning is. Even thinking about it is absurd. The Gu family is such a prestigious family, how could they allow such a thing to happen? There are many people in the world who look similar, and there are cases where biological mother and child don’t resemble each other. Heredity is highly complex, and a single example can’t be used as complete evidence."

Shen You’an trusted her intuition deeply: "Once suspicion arises, it’s hard to stop."

Faced with phenomena that contradicted her genetics knowledge, she felt a strong urge and a relentless curiosity to solve the mystery.

Liu Runxi still shook his head: "Rong Xianning is two years younger than Gu Bichen, age alone rules out all possibilities."

Shen You’an curled her lips: "Age can be faked."

Liu Runxi stared deeply at her: "You..."

Shen You’an’s focus on Rong Xianning truly surpassed his expectations. Now, she was even beginning to question Rong Xianning’s origins.

If she weren’t so focused on Rong Xianning, how would she have noticed his auricle and iris pattern, even the indentation at the corner of his mouth when he smiles?

Yet, despite his photographic memory, he had never noticed.

Without concern, there is no notice.

Suddenly, he thought of another possibility. If Rong Xianning had indeed swapped identities with Gu Bichen, then...

Liu Runxi felt a twinge of indescribable bitterness in his chest.

A delicate and pervasive itch bored into his heart and lungs, the sensation unsettlingly unfamiliar. At this moment, he did not yet recognize it as a feeling called jealousy.

For a moment, he nearly lost his balance.

He steadied himself by grasping the marble railing by the riverside, took a deep breath, and looked Shen You’an straight in the eye.

The lesson from before taught him not to avoid but to face it candidly.

"I trust your intuition, but we need more evidence, otherwise everything is just conjecture, and no one will believe us."

Shen You’an was happy for Liu Runxi’s unconditional trust: "So next, we need to find evidence. This matter is known only to the heavens, the earth, you, and me. We must not let a third person know."

The girl’s gaze shimmered like the glittering river behind her, bathed in moonlight. Liu Runxi felt his heart instantly soften into mush.

This was a secret only for the two of them.

Even though the secret concerned a third person.

Liu Runxi’s lips curled into a smile, his eyes gentle as moonlight.

A gentleman’s word, irrevocable even by four horses: "Alright."