Achondroplasia and genetics, illustration 插畫檔

Achondroplasia. Conceptual illustration showing figures displaying signs of achondroplasia, with a strand of DNA. Achondroplasia is the most common form of short stature in humans, and is caused by an autosomal dominant gene. In about 80% of cases this occurs as a new mutation during early development. In the other cases it is inherited. In this disorder the arms and legs are short, while the torso is typically of normal length. Other features include an enlarged head and prominent forehead. Life expectancy is typically normal.