专家称装死小羊基因突变致遗传缺陷，并非“演技”在线

Core Viewpoint - The "playing dead" behavior of a lamb in Ningxia is attributed to a genetic mutation causing a hereditary defect, rather than being a learned behavior or "acting" [1] Group 1: Genetic Mutation and Behavior - The lamb's reaction of becoming stiff and falling over when approached is a natural response known as "muscle rigidity" triggered by environmental stimuli [1] - Experts suggest that if breeders selectively breed sheep with this trait, it could lead to a population of lambs exhibiting the "playing dead" behavior [1] Group 2: Market Impact - The market value of the "playing dead" lamb has surged dramatically, increasing by 714 times to reach 300,000 yuan [1]