![lampreys possess a jaw dropping evolutionary origin](https://utterbuzz.com/wp-content/uploads/2024/07/lampreys-possess-a-jaw-dropping-evolutionary-origin-640x429.jpg)
Lampreys are one of only two living jawless vertebrates Jaws are formed by a key stem cell population called the neural crest New research reveals the gene regulatory changes that may explain morphological differences between jawed and jawless vertebrates.